Why You’ll Love This Recipe

Peanut Butter S’mores Sandwich Cookies combine everything you love about classic campfire s’mores with the rich, nutty flavor of peanut butter cookies. These indulgent treats feature soft peanut butter cookies sandwiched with gooey marshmallow fluff and melty chocolate, delivering nostalgic comfort in every bite. Perfect for parties, bake sales, or just satisfying your sweet tooth.

ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the cookies:
creamy peanut butterunsalted buttersugarbrown sugareggvanilla extractall-purpose flourbaking soda salt

For the filling:
marshmallow fluff or marshmallow creamplain chocolate bars or chocolate spreadgraham cracker crumbs (optional for crunch)

directions

Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large mixing bowl, cream together peanut butter, butter, sugar, and brown sugar until light and fluffy.

Add in the egg and vanilla extract, mixing until well combined.

In a separate bowl, whisk together flour, baking soda, and salt.

Gradually add dry ingredients to the wet mixture and mix until a dough forms.

Scoop and roll dough into small balls, then place on the baking sheet. Flatten slightly with a fork in a crisscross pattern.

Bake for 8–10 minutes until edges are set but centers remain soft. Let cool completely.

To assemble, spread marshmallow fluff on the flat side of one cookie, top with a square of chocolate or chocolate spread, and sandwich with another cookie.

Optional: Roll the sides in graham cracker crumbs for extra s’mores flavor and texture.

Servings and timing

This recipe yields approximately 18 sandwich cookies.
Preparation time: 15 minutes
Baking time: 10 minutes
Cooling and assembling time: 20 minutes
Total time: 45 minutes

Variations

Add mini marshmallows to the filling for extra texture.
Use Nutella instead of chocolate for a hazelnut twist.
Swap in crunchy peanut butter for added texture.
Make giant cookies for a bakery-style treat.
Dip half the sandwich in melted chocolate for a fancier finish.

storage/reheating

Store cookies in an airtight container at room temperature for up to 3 days.
Refrigerate for up to 7 days for a firmer filling.
Microwave assembled cookies for 5–10 seconds to enjoy warm and gooey.
Assembled cookies do not freeze well, but baked cookies can be frozen and filled later.

FAQs

Can I use store-bought peanut butter cookies?
Yes, though homemade gives better flavor and texture.

Can I toast the marshmallow fluff?
Yes, use a kitchen torch for a toasted effect before sandwiching.

Can I make these gluten-free?
Yes, use a gluten-free flour blend and confirm your chocolate and marshmallow fluff are gluten-free.

Can I use natural peanut butter?
Yes, but it may affect the texture—make sure it’s well stirred and not too oily.

How do I keep the filling from oozing out?
Let the cookies cool completely before assembling and chill slightly if needed.

Can I make them ahead of time?
Yes, bake cookies a day ahead and assemble just before serving.

Do I have to use graham cracker crumbs?
No, but they add a nice nod to the classic s’mores flavor.

What type of chocolate works best?
Milk chocolate gives classic s’mores taste, but dark or semi-sweet also work great.

Are these messy?
Yes—in the best way! Keep napkins handy.

Can kids help make these?
Absolutely—it’s a fun and kid-friendly recipe to make together.

Conclusion

Peanut Butter S’mores Sandwich Cookies are the ultimate mash-up of comfort and fun, blending rich peanut butter cookies with all the gooey, chocolaty goodness of a classic s’more. Whether you’re baking for a crowd or just want to treat yourself, these cookies deliver the perfect sweet bite with a nostalgic twist.