Perfect Swiss Meringue Buttercream

Made from 5 ingredients, this is perfect Swiss meringue buttercream. Written in easy terms with in-depth instructions and troubleshooting tips, this post teaches you how to make the best meringue buttercream even if you’ve failed before or if it’s your first try. This frosting is creamy, silky smooth, holds its shape beautifully, and the best partโ€”and why everyone loves itโ€”is that it’s not extra sweet like traditional American vanilla buttercream.

swiss meringue buttercream

Do you want to master Swiss Meringue Buttercream (SMBC) but are too nervous to try it? I get it, the thought of making meringue as the base of a frosting sounds complicated, timely, and intimidating. Let me break down that barrier for youโ€”this recipe is where you start.


What is Swiss Meringue Buttercream?

Swiss meringue buttercream joins other varietiesโ€”French and Italianโ€”as a stable, not overly sweet frosting. The process for each is a little different, but the Swiss method is arguably the easiest. Swiss meringue buttercream is made from cooked egg whites and sugar, butter, and flavorings like vanilla and salt. Whip the cooked egg whites and sugar into stiff peaks, then slowly add the butter before adding flavors. It’s out-of-this-world creamy, extra smooth, and the perfect sweetness for any confection. The whipping process is long and where some trouble can start, including never reaching stiff peaks. The butter can also melt, leaving you with SMBC soup. Or you can over-whip everything into curdles.

It’s a little more complicated than my whipped frosting, but it’s worth it! Today I’m putting you on the right SMBC track, plus there’s usually a fix for everythingโ€”and I teach you how in this post.

This Swiss Meringue Buttercream Is:

  • Made from 5 basic ingredients
  • Silky smooth and buttery
  • Thick and ultra creamy
  • Perfect for piping or spreading
  • Flavored with vanilla and a touch of salt
  • Not cloyingly sweet like traditional frosting
vanilla swiss meringue buttercream

Ingredients

Let me explain why each ingredient is important. Feel free to keep scrolling to the full recipe written below.

  1. Egg Whites: Egg whites and sugar form the meringue. Just as I recommend when making French macarons, use fresh eggs instead of carton egg whites. Here are all my recipes using leftover egg yolks. Success tip: Eggs separate much easier when theyโ€™re cold.
  2. Granulated Sugar: Use regular granulated sugar, not confectioners’ sugar.
  3. Unsalted Butter: Butter turns meringue into meringue buttercream. I recommend unsalted butter because salted butter tastes overpowering. Keep in mind that the frosting will turn soupy and thin if the butter is too warm. Make sure you’re using butter that is slightly cooler than proper room temperature butter. Remove butter from the refrigerator and set it out for just 30-40 minutes before you need to use it. It should be cool to the touch, about 60ยฐF (16ยฐC). For accuracy, I recommend using an instant read thermometer. Cut butter into Tablespoon size pieces before using.
  4. Vanilla Extract: Adds flavor. See FAQs below for other flavor options.
  5. Salt: Some SMBC recipes don’t use salt, but I strongly recommend it for another layer of flavor. You may be wondering why you can’t just use salted butter and skip the added salt, so make sure you review Salted Vs Unsalted Butter in Baking.
Swiss meringue buttercream on cupcakes

Swiss Meringue Buttercream Video Tutorial


How to Make Swiss Meringue Buttercream

Here’s an overview of the steps. Full instructions available in the recipe below. Feel free to keep scrolling to the full recipe if you’d like!

  1. Get rid of any grease residue. Wipe all tools that will touch the meringue with a little lemon juice or white vinegar. Grease or fat prevents your meringue from setting up.
  2. Separate the eggs. Save the yolks for another recipe.
  3. Cook the egg whites & sugar: Whisk sugar & egg whites together, then set the bowl over a saucepan filled with simmering water. Do not let the bottom of the mixing bowl touch the water. Whisk the whites and sugar constantly until sugar is dissolved and mixture has thinned out. The mixture will be thick and tacky at first, then thin out and appear frothy on top. To test that it’s ready, you can use your finger or an instant read thermometer. Lightly and quickly dip your finger (it’s very hot, be careful) and rub the mixture between your thumb and finger. You shouldn’t feel any sugar granules. If using a thermometer, the temperature should read 160ยฐF (71ยฐC).
  4. Whip it: Transfer warm mixture to the bowl of a stand mixer fitted with a whisk attachment (if you aren’t already using the metal bowl that comes with it). Beat until stiff peaks form and the meringue is no longer warm to touch, at least 10-15 minutes. On particularly humid days, it will take longer. If it’s still not reaching stiff peaks, stop the mixer, place the bowl in the refrigerator for 10 minutes, then return to the mixer and continue beating until stiff peaks form.
  5. If the bowl and meringue still feel warm at this point, wait until both cool to room temperature (around 70ยฐF (21ยฐC)) before adding the butter.
  6. Add the butter and flavor: Switch the stand mixer to the paddle attachment and add the butter 1 Tablespoon at a time. Wait for the butter to fully mix in before adding the next. After all the butter has been added, beat in vanilla and salt. Done!

A small egg separator is a helpful tool in this recipe.

egg whites for meringue

Cook and whisk egg whites and sugar over indirect heat. When it’s ready, the mixture will be frothy on top and thin. (Below, right.)

cooking egg whites and sugar on stove

What Are Stiff Peaks?

After several minutes of mixing, the meringue should form stiff glossy peaks. This means it forms stiff, smooth, and sharp points in the bowl or on the lifted whisk attachment.

Stiff peaks do not droop down.

stiff peaks for Swiss meringue

After reaching stiff peaks, let the meringue cool for a bit, then beat in the butter 1 Tablespoon at a time.

Success Tip: Because butter needs to be on the cooler side, I donโ€™t remove it from the refrigerator and cut it into Tbsp pieces until I start whipping the meringue.

cool room temperature butter

Add vanilla and salt, then you’re done. Buttercream is now deliciously creamy and smooth!

vanilla swiss meringue buttercream

5 Helpful Tools

  1. Saucepan & heatproof bowl: Cook egg whites and sugar on indirect heat in a heatproof bowl set over a pan of simmering water. (I just use the metal mixing bowl that comes with a stand mixer.) This cooking method is essentially how we cook the eggs in French silk pie and make homemade marshmallow creme. If you own a double boiler, just use that.
  2. Whisk: Constantly whisking the egg whites and sugar as they gently cook is key.
  3. Electric Mixer: Beating the meringue into stiff peaks requires an electric mixer. I strongly recommend a stand mixer, but a handheld mixer can work. Give your arm a break every few minutes because the beating steps are tiresome. A handheld mixer will take longer to beat the meringue, too.
  4. Egg Separator: Though not required, it’s vastly helpful to have an egg separator to ensure no yolks make it into the mixing bowl. I generally recommend stocking your kitchen with an egg separator because they’re an inexpensive tool you can use for so many recipes like French macarons and chocolate soufflรฉ.
  5. Instant Read Thermometer: Though also not required, it’s helpful to have an instant read thermometer (or a candy/oil thermometer) to determine the safe temperature of cooked egg whites, as well as the ideal temperature for the butter. Less mistakes this way.
Is it safe to eat?

Provided you aren’t allergic to any of these ingredients, yes. The eggs are cooked to 160ยฐF (71ยฐC), which is considered safe to eat for everyone including pregnant women and children. As always, use your best judgement and feel free to consult a Dr if you’re concerned.

Does SMBC crust?

No, Swiss meringue buttercream does not crust or dry out like American buttercream can. That’s why SMBC is excellent for creating the smoothest frosting detail on cakes and perfectly piped (yet still fluffy tasting!) designs.

Is it stable?

Yes, Swiss meringue buttercream is stable at room temperature. Though if eating on a particularly humid day, keep your frosted confections in the refrigerator as close to serving as you can. You can use SMBC under fondant-topped cakes and confections, too.

Can I add food coloring?

Yes and it’s best to tint SMBC with gel food coloring so you aren’t adding a lot of extra liquid. Beat food coloring into the frosting on low speed after you add the vanilla extract and salt.

Can you freeze Swiss meringue buttercream or make it ahead?

Yes. Swiss meringue buttercream is great left covered at room temperature for 1-2 days, but after that, refrigerate it for up to 5 days or freeze up to 3 months. If freezing, store in an airtight container, then thaw it at room temperature on the counter. Once completely at room temperature, about 72ยฐF (22ยฐC), place into the bowl of your stand mixer fitted with a paddle attachment and beat for 2-3 minutes until creamy again. If it separates or curdles, see troubleshooting tips below.

Can I add flavors?

Replace some (about 1 teaspoon) of vanilla extract with 1 teaspoon of another flavor extract such as lemon, coconut, orange, maple, or even 1 teaspoon of espresso powder. Taste, then add a touch more if desired. For potent extracts, like peppermint or almond, replace 1 teaspoon of the vanilla with just 1/2 teaspoon. For chocolate Swiss meringue buttercream, beat 8 ounces of pure melted and slightly cooled chocolate into the buttercream when you add the vanilla and salt. Make sure you’re using pure baking chocolate (the 4 ounce bars) like Baker’s or Ghirardelli brands found in the baking aisle.

Can I make strawberry Swiss meringue buttercream?

Yes! Using a food processor or blender, process 1 cup (about 25g) freeze-dried strawberries into a powdery crumb. You should have around 1/2 cup. If it’s not grinding down fine enough, you can sift it with a fine mesh sieve to rid larger seeds/pieces. Add the strawberry crumb powder when you add the vanilla.

Troubleshooting Swiss Meringue Buttercream

  1. Meringue Won’t Reach Stiff Peaks: Step 4 in the recipe below requires a long period of mixing the cooked egg whites and sugar together into stiff peaks. This mixture (the meringue) will never reach stiff peaks if there was a drop of egg yolk (fat) or grease in the mixture, mixing bowl, or on any tools you are using. Wipe down all of your tools with lemon juice or white vinegar, use an egg separator, and separate and add the egg whites one at a time to the mixing bowl. These are all instructions listed out in the recipe below. It’s also helpful to avoid making this on particularly humid days where there’s extra moisture in the air. If you did all of this and it’s still not reaching stiff peaks, the meringue could be too warm or it needs a break. See next.
  2. My Mixer Needs a Break: By all means, give it a break! Mixers can tire out while beating the cooked egg whites and sugar because this step requires a long period of mixing. If your mixer and its motor needs a break, it’s likely your meringue needs a break too. Stop what you’re doing, remove the whisk attachment (or beaters if you’re using a hand mixer), place the attachment/beaters in the bowl with the meringue, and refrigerate it all (covered or uncovered, doesn’t matter) for 20-30 minutes. This gives your mixer, as well as the meringue and mixing bowl, a chance to cool down. (Important: though it’s best to begin whipping the cooked egg/sugar while it’s still warm, it could simply need a cool break halfway through reaching stiff peaks.)
  3. Buttercream is Soupy/Too Thin: If your mixture has become too thin and soupy after you add the butter, your butter was likely too warm or the meringue was still too warm. Have no fearโ€”this is fixable by bringing down its temperature. Place the entire bowl in the refrigerator (covered or uncovered, doesn’t matter) for 20 minutes to cool down, then return it to the mixer and beat on medium-high speed until thickened. Any longer than this will solidify the butter, so only refrigerate in 20 minute spurts. If it’s still soupy, place back in the refrigerator for longer before re-whipping again.
  4. Buttercream Only Tastes like Butter: The main ingredient, besides egg whites, is butter. Make sure you’re using unsalted butter because salted butter leaves your frosting with an overwhelmingly salty/buttery flavor. Use pure vanilla extract to flavor it and add a pinch of regular table salt. Other flavored extracts work tooโ€”see the Ingredients section above.
  5. Buttercream Solidified in the Refrigerator: There’s a lot of butter in this frosting, so if it’s stored in a bowl in the refrigerator, it will solidify into one large mass just like a bowl of cookie dough. Two ways to fix this: sit it on the counter and bring it to room temperature. Once completely at room temperature, about 72ยฐF (22ยฐC), place into the bowl of your stand mixer fitted with a paddle attachment and beat for 2-3 minutes until creamy again. If you don’t have time to wait for it to come to room temperature or if your home isn’t warm enough, follow the same instructions as #3 in this list (Buttercream is Curdled/Too Thick). Placing over gentle heat will melt the edges and when whipped, the melty edges and solid center will come together into 1 smooth frosting.
  6. Buttercream is Curdled/Too Thick: If your meringue has separated, curdled, or is too thick at any point after you mix in all of the butter, just keep beating because it will eventually come together. If it’s only getting thicker and chunkier, there’s a quick fixโ€”and it’s my favorite. Place the mixture in your heat-proof bowl back over a pot of 2 inches of simmering water. Without stirring, let the edges of the meringue warm up and become liquid (the center of the meringue will still be solid), about 1-2 minutes. Remove from heat and return to the mixer. Beat meringue on low speed for 30 seconds, then switch to medium-high speed and beat until smooth, about 2 minutes. I have to do this 75% of the time, but I LOVE it because partially melting the SMBC then re-whipping actually creates a creamier frosting.

Pictured below: Curdled buttercream. See above.

curdled thick swiss meringue buttercream disaster

I know it seems complicated, but as long as you remain patient, read through this post, watch the video, prepare yourself by reviewing the recipe before beginning, you will be rewarded with the most luscious, not-overly-sweet frosting ever.

How to Use It:

cupcakes with Swiss meringue buttercream
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swiss meringue buttercream

Swiss Meringue Buttercream

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.7 from 483 reviews
  • Author: Sally
  • Prep Time: 25 minutes
  • Cook Time: 5 minutes
  • Total Time: 30 minutes
  • Yield: 5 cups
  • Category: Frosting
  • Method: Whipping
  • Cuisine: European
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Description

This is vanilla Swiss Meringue Buttercream perfection. It’s the ideal balance of sweet and creamy, without being as cloyingly sugary as American buttercream. (This is a far cry from how sweet that is!) Thick, sturdy, and perfectly pipe-able. This in-depth recipe sets you up for success on your 1st try.


Ingredients

  • 6 large egg whites (approximately 180g)
  • 2 cups (400g) granulated sugar
  • 1 and 1/2 cups (340g) unsalted butter, softened but still cool and cut into Tbsp size pieces (*see note*)
  • 2 teaspoons pure vanilla extract
  • 1/8 teaspoon salt


Instructions

  1. Watch the video tutorial above, review the troubleshooting tips, and read the recipe in full before beginning. Make sure all the tools you are using are completely cleaned, dried, and grease-free. A quick wipe with a little lemon juice or white vinegar is very helpful.
  2. Separate the eggs: If you haven’t done so yet, separate the eggs first. Separate 1 egg white in a small bowl, then place the egg white in your heatproof mixing bowl. Repeat with the remaining egg whites. This way, if a yolk breaks in one of them, you donโ€™t waste the whole batch.
  3. Whisk sugar into the egg whites, then set the bowl over a saucepan filled with just two inches of simmering water over medium heat. Do not let the bottom of the egg whites bowl touch the water. Whisk the whites and sugar constantly until sugar is dissolved and mixture has thinned out, about 4 minutes. The mixture will be thick and tacky at first, then thin out and be frothy white on top. To test that it’s ready, you can use your finger or an instant read thermometer. Lightly and quickly dip your finger (it’s very hot, be careful) and rub the mixture between your thumb and finger. You shouldn’t feel any sugar granules. If using a thermometer, the temperature should read 160ยฐF (71ยฐC).
  4. No need to let it cool down to start this next stepโ€”it’s important to begin mixing while it is still warm. Transfer mixture to the bowl of a stand mixer fitted with a whisk attachment (if you aren’t already using the metal bowl that comes with it). You can use a hand mixer instead, but this step takes awhile and your arm tires quickly. On medium-high speed, beat the mixture until stiff glossy peaks form and the meringue is no longer warm to the touch, at least 10-15 minutes. On particularly humid days, this has taken me up to 17-18 minutes. If it’s still not reaching stiff peaks, stop the mixer, place the bowlโ€”uncoveredโ€”in the refrigerator for 10 minutes, then return to the mixer and continue beating until stiff peaks form. (This has always worked for me when it’s taking forever to reach stiff peaks.)
  5. If the bowl and meringue still feel warm, wait until both cool to room temperature (around 70ยฐF (21ยฐC)) before adding the butter in the next step. Feel free to place it in the refrigerator. A warm bowl and meringue will melt the butter.
  6. Switch the stand mixer to the paddle attachment. On medium-high speed, add the butter 1 Tablespoon at a time. Wait for the butter to fully mix in before adding the next Tablespoon. After all the butter has been added, turn the mixer down to medium speed and fully beat in the vanilla and salt, about 30 seconds.
  7. Your Swiss meringue buttercream should be thick, creamy, and silky smooth and is ready to use on any cake, cupcake, or other confection.
  8. Too Thick or Too Thin: If your meringue has separated, curdled, or is too thick at any point after you mix in all of the butter, place the mixture in your heat-proof bowl back over a pot of 2 inches of simmering water. Without stirring, let the edges of the meringue warm up and become liquid (the center of the meringue will still be solid), about 1-2 minutes. Remove from heat and return to the mixer. Beat meringue on low speed for 30 seconds, then switch to medium-high speed and beat until smooth, about 2 minutes. Works every time. If your mixture has become too thin and soupy after you add the butter, place the entire bowl in the refrigerator (covered or uncovered, doesn’t matter) for 20 minutes to cool down, then return it to the mixer and beat on medium-high speed until thickened. Any longer than this will solidify the butter, so only refrigerate in 20 minute spurts. If it’s still soupy, place back in the refrigerator for longer before re-whipping again. More troubleshooting tips in the post above.

Notes

  1. Make-Ahead, Storing, & Freezing Instructions: Swiss meringue buttercream is great left covered at room temperature for 1-2 days, but after that, refrigerate it for up to 5 days or freeze up to 3 months. If freezing, store in an airtight container, then thaw it at room temperature on the counter. Once completely at room temperature, about 72ยฐF (22ยฐC), place into the bowl of your stand mixer fitted with a paddle attachment and beat for 2-3 minutes until creamy again. If it separates or curdles, see step 8.
  2. Special Tools (affiliate links): Electric Mixer (Handheld or Stand) | Instant Read Thermometer | Egg White Separator | Whisk | Double Boiler
  3. Yield: This recipe yields about 5 cups of frosting, which is enough to fill and frost a two layer 9-inch cake with a generous amount, to fill and frost a three layer 9-inch cake with just enough frosting, to lightly frost 2 dozen cupcakes, to heavily frost 1 dozen cupcakes (I had just enough for the huge swirls on 12 of the pictured cupcakes), or a 9×13 inch sheet cake (with some frosting leftover).
  4. Egg Whites:ย For best success, I recommend usingย fresh eggsย instead of carton egg whites. Here are all myย recipes using leftover egg yolks. Eggs separate much easier when theyโ€™re cold. Separate the egg whites one at a time and place the egg white into a large heat-proof mixing bowl (or a double boiler or the metal mixing bowl from your stand mixer) before separating the next. This way, if a yolk breaks in one of them, you donโ€™t waste the whole batch.
  5. There’s almost always a way to fix “ruined” Swiss Meringue Buttercream and it usually has to do with temperature. See step 8 as well as my troubleshooting tips in the post above.
  6. Butter:ย This buttercream will thin out and become liquid-y if the butter is too warm. Make sure you’re using butter that is slightly cooler than proper room temperature butter. Remove butter from the refrigerator and set it out for just 30-40 minutes before you need to add it to the meringue. Sometimes meringue takes longer than usual or it needs a break (see Troubleshooting above) and in that case, you should place the butter back into the refrigerator for a few minutes so it doesnโ€™t get too warm sitting out. The butter should be cool to the touch. For accuracy, I recommend using an instant read thermometer. Butter should be 60ยฐF (16ยฐC).
  7. Flavors & Colors: For flavor ideas including chocolate, see my Can I add flavors? FAQ above. For coloring, it’s best to tint this frosting with gel food coloring so you aren’t adding a lot of extra liquid. Beat food coloring into the frosting on low speed after you add the vanilla extract and salt.
  8. Half or Larger Batch: You can halve this recipe. The egg white/sugar mixture won’t take as long to cook and the meringue won’t take as long to reach stiff peaks. I do not recommend making larger batches at a time because it will quickly overcrowd and wear out your mixer. If you need more batches, make them all separately.

Adapted from Martha Stewart. I found it needed less butter, 1 more egg white, and more sugar in order to stabilize properly.

sally mckenney headshot purple shirt.
About the Author

Sally McKenney

Sally McKenney is a baker, food photographer, and New York Times best-selling author. Her kitchen-tested recipes and step-by-step tutorials have given millions of readers the knowledge and confidence to bake from scratch. Sallyโ€™s work has been featured on TODAY, Good Morning America, Taste of Home, People, and more.

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Reader Comments and Reviews

  1. Rhesa Sheffield says:
    December 11, 2025

    Is it possible to substitute brown sugar for the white sugar? I am needing a brown sugar meringue for the cake I plan to make myself for my birthday on Monday, Dec. 15th.

    Reply
    1. Beth @ Sally's Baking says:
      December 11, 2025

      Hi Rhesa, Some readers have used brown sugar, same amount, and it has worked wonderfully. We havenโ€™t personally tested it yet, though, so please do let us know how it goes for you!

      Reply
  2. Asa says:
    December 6, 2025

    I have never tried Swiss Meringue Buttercream before, but wanted to try something different. I am so happy I did. This was delicious and my cupcakes came out beautifully. I did half of the batch with 100% baking chocolate and the other half with freezer dried strawberries. Big shout out to Sally’s Baking for this delicious recipe.

    Reply
  3. Parker says:
    November 29, 2025

    Can you use cocoa powder instead of melted chocolate?

    Reply
    1. Erin @ Sally's Baking says:
      November 29, 2025

      Hi Parker, weโ€™ve only tested a chocolate version of this using melted and cooled chocolate. Weโ€™re sure you can use cocoa powder, but we havenโ€™t tested the perfect amount. Start by beating in 1 Tbsp at a time until you are satisfied with the flavor. Let us know how it turns out for you!

      Reply
  4. River Addie says:
    November 28, 2025

    Canโ€™t wait to try this!
    Iโ€™m just wondering if this is sturdy enough to pipe roses with?
    Itโ€™s to put on top of Christmas cupcakes!

    Reply
    1. Michelle @ Sally's Baking says:
      November 28, 2025

      Hi River, yes, this buttercream holds shape beautifully.

      Reply
  5. Pat says:
    November 23, 2025

    It is still soupy after refrigeration 2x and there are bits of butter
    What to do

    Reply
    1. Trina @ Sally's Baking says:
      November 23, 2025

      Hi Pat, keep trying! If itโ€™s still soupy, place back in the refrigerator for longer before re-whipping again.

      Reply
  6. Pat says:
    November 23, 2025

    Can I add coloring after I made the buttercream ahead of time. My granddaughter is making a cake for her cousin and using 5 colors

    Reply
    1. Trina @ Sally's Baking says:
      November 23, 2025

      Absolutely! We recommend gel food coloring.

      Reply
  7. Amy Garcia says:
    November 17, 2025

    I have made this and it is amazing! Iโ€™ve been struggling trying to find a really good pipeable frosting thatโ€™s not too sweet and versatile. This is awesome. Now I need to find a great cream cheese frosting recipe thatโ€™s as consistent in texture like this one. I was hoping to find something in the comments or notes for this one that had a modification for cream cheese, but I did not. Thank you!

    Reply
    1. Trina @ Sally's Baking says:
      November 17, 2025

      Hi Amy! We havenโ€™t tested this Swiss meringue buttercream with cream cheese. If you do, let us know how it goes! If you are interested hereโ€™s our less sweet whipped frosting recipe (with cream cheese!).

      Reply
  8. Madeline Rivard says:
    November 16, 2025

    I want to try to make swiss meringue buttercream for the 1st time. How many layers of a 9 inch cake will this frost?

    Reply
    1. Beth @ Sally's Baking says:
      November 16, 2025

      Hi Madeline, this recipe yields about 5 cups of frosting, which is enough to fill and frost a three-layer 9-inch cake with just enough frosting. If you need extra for decorating, we would make more.

      Reply
  9. Christina says:
    November 14, 2025

    Hi Sally! Would you suggest aging the egg whites the way you do with your French macaron recipe? Would there be any benefit to this here? Thank you!

    Reply
    1. Lexi @ Sally's Baking says:
      November 17, 2025

      Hi Christina! We don’t find the extra step of aging the egg whites necessary here. Aging the egg whites helps to relax the proteins in the egg so that it can whip up more easily, but since the egg whites are cooked here, that does the job of relaxing the proteins before whipping. Hope this helps!

      Reply
      1. Christina says:
        November 18, 2025

        Thank you, thatโ€™s interesting to know!

  10. LaDonna Saylor says:
    November 13, 2025

    Help it got glossy and white but never got the stuff peaks. I heated and cooled for awhile.

    Reply
    1. Lexi @ Sally's Baking says:
      November 14, 2025

      Hi LaDonna, see “Troubleshooting Swiss Meringue Buttercream: Meringue Wonโ€™t Reach Stiff Peaks” in the post for all of our troubleshooting tips. Hope this helps!

      Reply
  11. Kathy says:
    November 12, 2025

    Gorgeous Swiss meringue buttercream! The mouth feel was out of this world! I subbed a bit of the vanilla for almond as suggested in the recipe for a slightly different flavor. It was so subtle, I think I will sub 1 tsp instead of 1/2 tsp next time as I really like the almond flavor. My only difficulty was the frosting turned out too thick to pipe, but was otherwise fantastic and spread well. I know this was a “me” problem and not a recipe problem. Did I over mix, or how do I make sure it’s a bit lighter/fluffier next time? Thank you for the great recipe and fantastic instructions! This will be my go-to recipe for this type of frosting.

    Reply
    1. Lexi @ Sally's Baking says:
      November 12, 2025

      Hi Kathy, we’re so glad you enjoyed it! Did it seem curdled as well? If your meringue has separated, curdled, or is too thick at any point after you mix in all of the butter, just keep beating because it will eventually come together. If itโ€™s only getting thicker and chunkier, thereโ€™s a quick fixโ€”and itโ€™s our favorite. Place the mixture in your heat-proof bowl back over a pot of 2 inches of simmering water. Without stirring, let the edges of the meringue warm up and become liquid (the center of the meringue will still be solid), about 1-2 minutes. Remove from heat and return to the mixer. Beat meringue on low speed for 30 seconds, then switch to medium-high speed and beat until smooth, about 2 minutes. We have to do this 75% of the time, but we LOVE it because partially melting the SMBC then re-whipping actually creates a creamier frosting. Hope this helps for your next batch!

      Reply
  12. Tom Meara says:
    November 9, 2025

    This recipe needs to be removed from this website. I love Sally’s recipes and have very successfully baked many but this was is an absolute failure, twice . I am a meticulous baker and this recipe failed on consecutive days. It was soupy and lumpy and didn’t even taste very good. I cleaned my bowls, wiped everything with lemon juice, used a thermometer, and timed my whipping. I started whipping slowly (on my KitchenAid) then slowly increased the speed. After 15 minutes it was white soup. I know how to separate eggs and on both attempts, there were just whites in the bowl. I refrigerated the frosting for 10 minutes and whipped it again for 3 minutes. No change. I added the butter (which had been pulled from the fridge as directed when I started cooking the frosting) but the soup was not stiff enough to allow the butter to mix. The result was a lumpy white soup. This was all done after the first attempt the day before failed to form stiff peaks. I can make a killer lemon meringe pie but this recipe is a disaster.

    I will never try to make this frosting again, and will hesitate to try new recipes from Sally.

    Reply
    1. Sally @ Sally's Baking says:
      November 10, 2025

      Hi Tom, Iโ€™m so sorry this was such a frustrating experience. Swiss meringue buttercream can be finicky, and itโ€™s so disappointing when it doesnโ€™t come together after all that work. When the meringue stays soupy, itโ€™s usually because it didnโ€™t whip to stiff peaks before adding the butter, or because a tiny bit of fat interfered in that process. The mixture needs to reach 160ยฐF, then whip until the bowl is cool and the meringue is glossy with stiff peaks. If the meringue or butter is still warm, it wonโ€™t thicken. I truly appreciate you sharing this feedback. Iโ€™ll reread the post to see where I can add clearer troubleshooting tips. Thank you for trying the recipe, and I hope your next bake is a much better experience.

      Reply
  13. Melissa MacDonald says:
    November 8, 2025

    I absolutely love the taste of this icing. I find it sometimes difficult to get smooth. Is there a way to get the air bubbles out?

    Reply
    1. Michelle @ Sally's Baking says:
      November 8, 2025

      Hi Melissa, f there are too many air bubbles in your frosting you can use a spatula or wooden spoon and mix it by hand. As you mix, push it up against the sides of the bowl which will pop the bubbles and smooth it out.

      Reply
  14. Sharon says:
    November 8, 2025

    Thanks for the recipe! Is it possible to freeze in store the buttercream and then add the extracts after I defrost and re-whip?

    Reply
    1. Michelle @ Sally's Baking says:
      November 8, 2025

      Hi Sharon, absolutely! See the recipe notes for freezing instructions.

      Reply
  15. Linda says:
    November 8, 2025

    Great instructions and I really appreciate the recommended temperatures at the various stages.
    I made a small batch last night so I could give my layers a crumb coat; will make a full batch today to finish decorating.
    The frosting had good spreadable consistency, it didnโ€™t *taste* buttery, but it left a greasy film in my mouth. Did I not whip it enough after adding the butter? Or did I whip the meringue too long?

    Reply
  16. Stephanie K says:
    November 6, 2025

    Best meringue frosting ever. Directions we very good and clear. Will definitely keep this recipe handy!!!

    Reply
  17. Chams says:
    November 6, 2025

    I love your recipes! This one is amazing as well and never fails.. thank you! Always comes out so creamy and silky smooth.. like ice cream! Flavour is amazing too.. โ˜บ๏ธ

    Reply
    1. Ellie says:
      December 8, 2025

      Hello! I am looking to make the cream-filled chocolate cupcakes and use SMBC instead of the american buttercream. I was wondering how this recipe scales down to only produce about 1-1.5 cups for filling the cupcakes and a little extra for the white strip topping?

      Reply
      1. Stephanie @ Sally's Baking says:
        December 9, 2025

        Hi Ellie, You can easily cut this recipe in half and if you still have extra you can freeze it for up to 3 months (see recipe notes for details). We haven’t tried scaling it to make even less although you can certainly try it.