Marshmallow PEEPS Cookie Sandwiches

Soft, thick, and puffy cookies filled with peanut butter M&Ms and sprinkles, then smooshed together with a marshmallow PEEP. Dangerously good!

Marshmallow PEEPS Cookie Sandwiches - so festive and easy to make!

I got a little wild in the kitchen this weekend. Perhaps it was the dreary rainy weather yesterday that had me craving some fun? Or maybe it was the smorgasbord of Halloween candy I have stocked in my pantry? Yeah that’s definitely it. Festive sprinkles, peanut butter M&Ms, and PEEPS® Pumpkins.

They’re soft, melty, peanut butter-y, sprinkle-y, and of course – frightfully ooey-gooey.

Soft, thick, and puffy cookies filled with peanut butter M&Ms and sprinkles, then smooshed together with a marshmallow PEEP. Dangerously good!

If you love PEEPS marshmallow candies, you’re going to flip for these crazy cookie sandwiches. If you’re not a fan of PEEPS, it’s all good. You’ll be melting them into marshmallow oblivion anyway. Let’s get started on making your new favorite cookie sandwich.

I used my favorite soft-baked chocolate chip cookie recipe. This is a recipe that makes use of cornstarch (cornflour) in the dough. Cornstarch softens and thickens the dough, resulting in one insanely melt-in-your-mouth soft batch cookie.

Think of the softest cookie you’ve ever had…

These cookies are even softer.

Soft-Baked Peanut Butter M&M Cookies - seriously seriously soft!

If you’re more of a chewy cookie person, use my chewy chocolate chunk cookie dough instead. That cookie dough still uses cornstarch, but melted butter and the addition of an extra egg yolk produces extreme chew. I love both cookie recipes equally, but today the super soft cookie won my heart.

I filled the cookie dough with festively colored peanut butter M&Ms and sprinkles. As my mixer beat these add-ins into the dough, some of the peanut butter M&Ms broke up and the peanut butter filling became infused in the dough. Paired with the gooey marshmallow from the PEEPS? It’s like a fluffernutter-sprinkle-cookie-sandwich. SO dang good, right?

Once the cookies are baked, allow them to cool completely on the counter. Then put them in the refrigerator for at least 30 minutes. You want to use cold cookies for the assembly of your cookie sandwiches since you will be working with melted marshmallow. Putting the cookies into the microwave for too long will make them too soft and fragile.

Now get your little PEEPS ready to go. You may use PEEPS Pumpkins, PEEPS Ghosts, PEEPS Bunnies, PEEPS Chicks – anything PEEPS, any time of year.

Their little smiles are just too cute; I can’t even handle it.

Marshmallow PEEPS Pumpkins

You will have about 20-24 larger cookies from the cookie batch. Arrange two PEEPS onto half of your cookies. Remember, your cookies should be cold since you will be nuking them in the microwave.

Microwave the open-faced PEEPS cookie sandwich for about 8-12 seconds in the microwave. Now the microwave time solely depends on your microwave wattage. Watch the PEEPS closely. Once they begin to puff up, stop the microwave. You don’t want to overmelt your PEEPS and your cookie or else you won’t be able to pick it up. But umm… an overmelted cookie would still be divine in my eyes. 😉

As soon as you remove the open-faced PEEPS cookie sandwich from the microwave, smoosh another cookie on top to make a complete sandwich.

Soft, thick, and puffy cookies filled with peanut butter M&Ms and sprinkles, then smooshed together with a marshmallow PEEP. Dangerously good!

All of that gooey, sticky marshmallow flowing out of the sides? Divine. Move over turkey-on-wheat, I have a new favorite sandwich.

The cookie sandwiches taste best the moment you make them. Obviously you can’t eat 10-12 cookie sandwiches yourself, so it’s a wonderful treat to make for a girls night, kid’s party, slumber parties, game day, etc. Or you can make the batch of cookies and make your marshmallow PEEPS cookie sandwiches one at a time over a few days. We made about 6 cookie sandwiches from the batch and Kevin brought the rest of the peanut butter M&M cookies to work.

If you’re looking for that perfect festive cookie, these are exactly what you need. Marshmallow + peanut butter + chocolate candy shell + sprinkles + buttery cookie dough. Do I really have to say more?!

Soft, thick, and puffy cookies filled with peanut butter M&Ms and sprinkles, then smooshed together with a marshmallow PEEP. Dangerously good!

Follow me on Instagram and tag #sallysbakingaddiction so I can see all the SBA recipes you make. 

clock clock icon cutlery cutlery icon flag flag icon folder folder icon instagram instagram icon pinterest pinterest icon print print icon squares squares icon

Marshmallow PEEPS Cookie Sandwiches

  • Author: Sally
  • Prep Time: 1 hour, 15 minutes
  • Cook Time: 10 minutes
  • Total Time: 2 hours, 15 minutes
  • Yield: 10-12 large cookie sandwiches
  • Category: Cookies
  • Method: Baking
  • Cuisine: American


Soft, thick, and puffy cookies filled with peanut butter M&Ms and sprinkles, then smooshed together with a marshmallow PEEP. Dangerously good!


  • 3/4 cup (1.5 sticks or 170g) unsalted butter, softened to room temperature
  • 3/4 cup (150g) packed light or dark brown sugar
  • 1/4 cup (50g) granulated sugar
  • 1 large egg, at room temperature*
  • 2 teaspoons pure vanilla extract
  • 2 cups (250g) all-purpose flour (spoon & leveled)
  • 2 teaspoons cornstarch
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 and 1/4 cups (250g) peanut butter M&Ms (or regular M&Ms, peanut M&Ms, chocolate chips)
  • 1/2 cup sprinkles
  • 2024 PEEPS marshmallow candies


  1. In a large bowl using a hand-held mixer or stand mixer with paddle attachment, beat the butter for 1 minute on medium speed until completely smooth and creamy. Add the brown sugar and granulated sugar and mix on medium speed until fluffy and light in color. Mix in egg and vanilla. Scrape down the sides and bottom of the bowl as needed. In a separate bowl, combine flour, cornstarch, baking soda and salt. On low speed, slowly mix into the wet ingredients until combined. The cookie dough will be quite thick. Add the peanut butter M&Ms and sprinkles and mix for about 5 seconds until evenly disbursed. Cover dough tightly with aluminum foil or plastic wrap and chill for at least 1 hour and up to 2 days. Chilling is mandatory for this cookie dough.
  2. Remove cookie dough from the refrigerator and allow to sit at room temperature for 10 minutes. Preheat oven to 350°F (177°C). Line a large baking sheet with parchment paper or a silicone baking mat. Set aside.
  3. Once chilled, the dough will be slightly crumbly, but will come together if you work the dough with your hands as you roll into individual balls. Roll balls of dough, about 1.5 Tablespoons of dough each, into balls. Bake for 8-10 minutes, until barely golden brown around the edges. They will look extremely soft when you remove them from the oven. Allow to cool for 5 minutes on the cookie sheet. If the cookies are too puffy, try gently pressing down on them with the back of a spoon. They will slightly deflate as you let them cool. Transfer to cooling rack to cool completely at room temperature. Then stick the cookies into the refrigerator for at least 30 minutes. You need cold cookies to make the sandwiches.
  4. Arrange two PEEPS onto half of the cold cookies. Microwave, one by one, for 8-12 seconds until the PEEP begins to puff up. Depending on your microwave wattage, do not microwave for any than that or your cookie will fall apart and be too fragile to pick up. Smoosh another cookie on top creating a sandwich. Cookie sandwiches taste best right after they are made. Cookies (without PEEPS) stay fresh at room temperature for up to 1 week.


  1. Egg: Room temperature egg is highly suggested for this cookie dough. It will disburse more evenly when mixed. To bring the egg to room temperature quickly, drop into a cup of warm water for 5 minutes.
  2. Be sure to check out my top 5 cookie baking tips AND these are my 10 must-have cookie baking tools.

Keywords: peeps cookie sandwiches


  1. Just curious…who eats all of the cookies and treats you make!?!?

    1. Hi Lisa! Feel free to read my FAQs:

  2. Jess @ On Sugar Mountain says:

    You had me at “smooshed together with a marshmallow peep” ! These are gorgeous, Sally, and I am practically drooling over my keyboard over these ! 😀

    1. Haha! I couldn’t find a better word that “smooshed”

  3. Georgia @ The Comfort of Cooking says:

    I absolutely love these creative little cookie sandwiches, Sally. They’re so fun and festive for Halloween!

  4. Those are so cute and festive! Peeps get such a bad rap, they’re just marshmallows with personality! I actually made a very similar sandwich cookie for my brother’s birthday a couple months ago, but I toasted the Peeps (gas stove) to soften them before sandwiching. A little more time-consuming, but then they keep for a few days. Thanks for another fun recipe!

    1. I have to try toasting the PEEPS next, Markie! And I agree. They’re just marshmallows with a sugary coating. 🙂

  5. So cute! And cookie sandwiches are probably the best thing ever, because then you get to eat TWO cookies ;). I bet this would be great with the flavored peeps…like the chocolate cats! I love the fall colors throughout your post!!

    1. chocolate cats?!?!?! I have to get my hands on those!

  6. Chung-Ah | Damn Delicious says:

    Sally, these are so stinking cute! I need to stock up on peeps now!

  7. Elizabeth @ Confessions of a Baking Queen says:

    I haven’t even seen halloween peeps, it’s crazy how almost all candy has a version for each holiday. I grew up sticking peeps in the microwave so can’t wait to try it stuffed in a cookie, delish!

  8. These look so, so fun! What a creative use for Peeps. I love them straight out of the box/tray, but these cookies would be even better : )

  9. Zainab @ Blahnik Baker says:

    I love these and your crazy weekend ideas. Soft cookies are the best!!!

  10. I love that you stuffed peeps in between cookies! I could go for one!

  11. Oh wow, I could go for a few of these right now 😉 what an awesome idea!

  12. Birds Cookie Cutters says:

    I want to take a bite out of the screen. These look incredible!

  13. “Frightfully ooey-gooey”

    1. I can’t stop laughing.

1 2

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

With kitchen-tested quality recipes and step-by-step tutorials, my goal is to give you the confidence to bake and cook from scratch.

Sally's signature

Recipes You’ll Love



Join the community on the 1st of every month as we tackle a new challenge recipe. Review Sally's Baking Challenge FAQ page if you have any questions.

View More

A tradition since 2013, every December we countdown to Christmas with 10 new cookie recipes in a row!

View More

The first week of every November is all about Thanksgiving Pies.

View More

My Cookbooks

Sally's Cookbooks

About Sally

Welcome to my Kitchen!

I’m Sally, a cookbook author, photographer, and blogger. My goal is to give you the confidence and knowledge to cook and bake from scratch while providing quality recipes and plenty of pictures. Grab a cookie, take a seat, and have fun exploring! more about Sally