S’more Cookie Bars

Soft & chewy graham cracker cookie bars with chocolate and marshmallow swirls.

Soft & chewy graham cracker cookie bars with chocolate and marshmallow swirls! Easy recipe on sallysbakingaddiction.com

If I could live off of one food for the rest of my life, it would be a s’more. The gooey marshmallow, the melty chocolate, the grahams. Technically that’s three foods, but stick with me here.

I’d also live off of peanut butter, mangoes, and this carrot cake.

But seriously… s’mores.

I don’t know anyone who can resist a s’more.

And if they can, their tastebuds must not be working properly.

Soft & chewy graham cracker cookie bars with chocolate and marshmallow swirls! Easy recipe on sallysbakingaddiction.com

My infatuation with s’mores expands to brownie pie, chocolate chip cookies, puppy chow, PEEPS, peanut butter cookies, rice krispie treats, and 7 layer bars. Pick your poison.

And yesterday, I wanted some more… s’more.

I made a basic cookie dough, swapping some of the flour with graham cracker crumbs. The cookie part tastes like thick & soft graham crackers. Almost like a graham cracker blondie – buttery, brown sugary, chewy, grahamy, and sweet. To make these, you’ll simply layer 2/3 of the graham cracker cookie dough into the bottom of a pan. Top with chocolate chips, marshmallow creme (Fluff), and then the rest of the graham cracker cookie dough.

It’s a variation of your classic campfire treat. Simply bake everything together into a bar and you have a travel friendly, unique way to get your s’more fix.

Soft & chewy graham cracker cookie bars with chocolate and marshmallow swirls! Easy recipe on sallysbakingaddiction.com

An important thing to note: do not use marshmallows in lieu of the marshmallow creme. The marshmallows will disintegrate into the dough, creating unpleasant looking craters, and become virtually invisible. You won’t really even taste them. I’ve tried that with cookies before. An ugly fail! Use marshmallow creme, which stands up to the heat of the oven.

I love marshmallow creme and don’t bake with it nearly enough! Fluff reminds me of my sister, Sarah. Growing up, Sarah always asked for fluffernutter sandwiches and I stuck to PB&Js.

Soft & chewy graham cracker cookie bars with chocolate and marshmallow swirls! Easy recipe on sallysbakingaddiction.com

These cookie bars are SO soft. Kevin asked me how I got them to be so soft. “Did you underbake them like you do with your cookies?” No – I didn’t. The graham cookie layer just stays soft when baked for 25 minutes. The tops of my cookie bars got a little brown, so they aren’t underbaked. Just magically soft. They will melt in your mouth.

I can’t decide which part I like the most. The melty chocolate? The gooey marshmallow? Or the soft & chewy graham cookie. I’m not really sure – it just tastes incredible when sandwiched all together. My tip to you: eat these warm! You’ll really feel like you’re next to the campfire on a hot summer night.

Kevin’s coworkers are getting the leftover bars today. Guys, if you’re reading this… you’re welcome. And I’m sorry there aren’t that many leftover. I cannot resist s’mores!!

Soft & chewy graham cracker cookie bars with chocolate and marshmallow swirls! Easy recipe on sallysbakingaddiction.com

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Oh hi! Welcome to S’mores Mania.

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S’mores Cookie Bars

  • Author: Sally
  • Prep Time: 10 minutes
  • Cook Time: 25 minutes
  • Total Time: 3 hours
  • Yield: 16 bars
  • Category: Bars
  • Method: Baking
  • Cuisine: American


Soft & chewy graham cracker cookie bars with chocolate and marshmallow swirls.


  • 1/2 cup (115g) salted butter, softened to room temperature*
  • 3/4 cup (150g) packed light brown sugar
  • 1 teaspoon pure vanilla extract
  • 1 large egg, at room temperature
  • 1 cup (125g) all-purpose flour (spoon & leveled)
  • 1 cup (100g) graham cracker crumbs (9 graham crackers)
  • 1/2 teaspoon baking powder
  • 1 and 1/4 cup (225g) semi-sweet chocolate chips
  • 1 heaping cup marshmallow creme


  1. Preheat oven to 350°F (177°C). Line an 8×8 or 9×9 square baking pan with aluminum foil, leaving enough overhang on the sides to easily remove the bars when they have cooled. Set aside.
  2. In a large bowl using handheld or stand mixer fitted with a paddle attachment, cream the butter and brown sugar together on medium-high speed. Beat for about 2 minutes until smooth and combined, then add the vanilla extract and egg, beating until combined. Scrape the sides of the bowl down as needed. Set aside.
  3. Toss the flour, graham cracker crumbs, and baking powder together until combined. With the mixer running on low, slowly add the dry ingredients into the wet ingredients. Mix until combined.
  4. Press 2/3 of the graham cookie dough into prepared pan. Spread the marshmallow creme on top. This will be tricky since the marshmallow creme is so sticky, but do the best you can to get an even layer. (Sometimes I spray the bottom of a spatula with nonstick spray to spread it around.) Sprinkle the marshmallow creme with chocolate chips. Mold the remaining cookie dough into flat pieces and layer on top of the chocolate chips. You won’t have enough dough to make one single layer, so some chocolate chips will be exposed. That’s ok.
  5. Bake the bars for 25 minutes, or until the top is lightly golden brown. Allow to cool completely with the pan set on a wire rack before cutting into squares.
  6. Bars stay fresh covered tightly at room temperature for up to 1 week, if they last that long! I enjoy the cookie bars warmed up in the microwave for 20 seconds.


  1. Freezing Instructions: Bars can be frozen for up to 3 months. Simply thaw overnight in the refrigerator, then bring to room temperature before serving.
  2. Butter: If using unsalted butter, add in 1/4 teaspoon of salt with the flour.

Keywords: smore cookie bars

Soft, chewy, and completely addicting S'mores Cookie Bars. Easy to make, too! Recipe on sallysbakingaddiction.com


Comments are closed.

  1. Shelby @ Go Eat and Repeat says:

    Oh. My. Goodness. I think I’ve died and gone to heaven!

  2. Could you freeze the dough and cook later?

    1. Absolutely. Up to 2-3 months. Thaw overnight in the refrigerator before baking.

  3. Heather @ Run Eat Play says:

    Making these today for the Superbowl! We’re stuck inside with a blizzard and these will be the perfect treat! Thanks for all the awesome recipes!!

  4. These are AMAZING!!! Thank you so much for this recipe, I literally took these out of the oven about 25 minutes ago and they are heaven!!

  5. Could I use unsalted butter instead?

    1. Yep, just add a 1/4 tsp of salt when mixing. Good luck!

  6. jessica hirsch says:

    can I use coconut sugar instead of brown sugar?

    1. I’ve never tried using coconut sugar in these bars– but it’s worth a shot. Enjoy.

  7. These bars look so yummy! Can I double the recipe & then bake in a 9×13 pan? I don’t think one batch will be enough!

    1. Yep! Double the recipe – I am unsure of the exact baking time though.

  8. I am a novice in the kitchen and made these on Friday…they were dangerously good and easy for a beginner like me. Any suggestions for spreading the marshmallow crime so it ends up where it’s supposed to? Can puréed avocado or yams be used in place of butter?

  9. Could you make these as individuals in muffin cups?

    1. That’d work! I’m unsure of the bake time.

  10. Here’s a tip I found useful. To spread the marshmallow creme more easily, dip a large spoon in water and use the back of it to spread the marshmallow without it sticking. 

  11. Made these yesterday. Simply delish. I feel I have to go to confession they are so sinfully good. House smelled heavenly while they were baking. It was hard to resist them until they cooled. I brought some to my sister (she’s my next door neighbour) and my niece’s boyfriend (visiting for supper) scarfed 3 pieces down like a pig at a trough. This recipe is so simple and is definitely a keeper.

  12. Stumbled upon this recipe and thought it sounded delicious. Brought it to a bbq over the summer for 10 hungry boys and it was a hit. A few weeks back, I made 3 batches for my boyfriend and a bunch of his friends, and he’s been nagging me to make them again ever since. Finally got around to it today! I don’t usually comment on cooking websites but I use this recipe way too much not to say thanks for the awesome recipe! My roommates call me world’s best girlfriend and roommate for making these bad boys.

  13. Made these for the first time today and I was worried about the spreading of the fluff. But turns out it wasn’t that difficult. I spooned several gobs all over the top and let it sit for a few minutes. It spread most of it on it’s own and I used a butter knife to spread the remaining. Thought this may be helpful to anyone who is trying this for the first time. 

  14. Has anyone made these without the egg???? I’m out of eggs 🙁

  15. Dying to try this recipe. Quick question- what consistency should the graham crackers be, fine or coarse?


    1. Fine crumbs.

  16. I know that this is a pretty old post, but when I ran across it a few months ago and made these, I was obsessed. There is something so addicting about these bars.  I am not sure if it’s the buttery cookie or the marshmallow cream that bursts out of the cracks on the top of the cookie or the warm oozy chocolate, but I can’t stop eating these.  

    I like to experiment and try different recipes all the time.  However, I have made these (insert embarrassingly high number here) times (again today as a matter of fact) and I look forward to having a reason to make them again. 

    I just wanted to thank you for a deceptively simple but exceedingly delicious recipe.

    1. Aren’t they SO easy?? So glad you love them too.

  17. Very easy to make!  I only wish I had bought more fluff — the more of a heaping cup the better!  This tasted great with a glass of milk.

  18. I know this is an older recipe but I decided to try it and they turned out sooo amazing! I’m a huge marshmallow fan and I love anything with chocolate so these were perfect for me! Super easy recipe and everything about it was awesome! The cookie dough was perfectly soft but held together, the middle was amazing and gooey with the perfect amount of marshamallow and chocolate. My new favorite recipe, thank you! 

    1. Thanks for letting me know you loved them Tori!

  19. Absolutely delicious! I made this for a cookout and everyone was raving about these. 

  20. I can’t find Marshmallow Fluff in Hawaii. Can I use Kraft Jet-Puffed Marshmallow Creme instead of Marshmallow Fluff?

    1. Yep, same stuff!

      1. Thank you!

  21. leah rosenberg says:

    Hi Sally,

    I know it’s not a recent post, but I’ve just stumbled upon it and I must say, this recipe sounds incredible! I plan to make this as cookie cake, so I’m going to double it. I wonder if it would work to put chopped up Hershey’s bars instead or in addition to the chocolate chips to give it an even more authentic S’mores taste and look? I also want to add the tiny little mini jet puffed marshmallows (like the one’s in hot cocoa.) Do you think this will be okay in this recipe? Don’t want to overload the dough!

    Thank you

    1. Hi Leah, you can definitely use broken up/chopped Hershey’s bars instead or along with the chocolate chips. You can add the mini marshmallows, but don’t replace the marshmallow creme. The marshmallows melt and disappear in the bars! So the marshmallow creme is key.

  22. Being that I am preparing to go camping for Labor day, I decided to make this recipe to satisfy my smore craving, and I dont think I could ever look at campfire smores the same after trying this recipe! These bars are perfection!! The only difference is I might crush my graham crackers a littl more the next time, but otherwise these were fabulous! My family of three finished the entire batch!

  23. Hi Sally,
    Your blog is the best!! I’m going to make these for a pitch-in so will be doubling the recipe to fit a 9×13 pan. I am just wondering how long I should bake them for then? Thanks!

  24. I can’t find any graham crackers in my country, so can honey Teddy grahams work? Thank you!

  25. Hi! I can’t findy anythig like marshmallow puff, creme etc in my country (philippines). Tried to call all the baker’s shop that I know. Can you help me what can I use to substitute? Big help, I wanna make some of this for tomorrow’s Christmas Eve. Kudos

  26. I don’t usually comment….BUT these are the best bars I have ever had I think…everyone loved them and some had seconds even tho there rich…everyone said this recipe is a keeper and fairly easy to make. Going to double next time for the church dinner. Thank you for this recipe! I found if you set the marshmallow in a warm place for a few mins you will not have any trouble spreading it mine sat near the stove while I was cooking chili and it worked well for me. Everyone’s new favorite dessert! 🙂

  27. Callie Gibson says:

    I was DYING to make these from the moment you re-posted this recipe a few months ago. I finally got the chance – as the dessert for lunch one day for a summer camp. I quadrupled the recipe (I know…) and baked it in a half sheet pan in a convection oven. I cut the cook time in half, but I probably could have left them in for another minute or so.

    The center was super gooey, but OH SO GOOD.

    They were a huge hit. My brother probably ate a quarter of the pan all by himself. It’s definitely a repeat-er recipe. Thanks for creating absolute amazingness, Sally!

    1. Quadrupled!? Now that’s the way to go when it comes to s’mores cookie bars 🙂 I’m so glad they were a hit!

  28. These are so great! I love s’more-flavored stuff but most recipes fail to capture it perfectly. These guys taste even better than the real thing, and I love the look of the toasty marshmallow fluff peeking through the cracks in the crust. I’ve made them several times now and they are always a hit. Thanks so much!

    1. O.k. Since I started using.your recipes, my husband has been looking more and more round. I look for dessert recipes everyday to freeze and eat! Who are we kidding? I never post anything and I Don’t have a facebook or twitter but wanted you to know I always land on one of yours. And they are like magic, in that they disappear.

  29. This is the best recipe! I made another by mistake & this one is much better. I deleted the other one. MY SON LOVES marshmallow!

  30. These would be great for a crowd. Is there a good way to double the recipe and bake them in a larger pan?

    1. Hi Jan! You can double the recipe for a 9×13 pan. The bake time will be longer.

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