When I first came up with the idea for these Peanut Butter S’mores Sandwich Cookies, it was out of pure nostalgia. I wanted to combine my favorite campfire memory—gooey s’mores—with the rich, comforting flavor of peanut butter cookies. The result? A decadent, chewy, sweet treat that instantly brings smiles to every face around the table. These cookies are the kind of dessert that doesn’t last long in my kitchen, and once you try them, you’ll understand why.

You’re going to absolutely love this recipe. It’s indulgent without being complicated, playful yet satisfying, and offers that magical combination of peanut butter, melted chocolate, and creamy marshmallow. These sandwich cookies strike the perfect balance of texture and flavor—soft and chewy on the outside, sweet and gooey on the inside. Plus, they look just as impressive as they taste.

What makes these cookies even more wonderful is their versatility. They’re perfect for bake sales, after-school snacks, birthday parties, or just a special weekend treat. You can customize them easily, too—whether you want to use dark chocolate for a richer bite, or marshmallow fluff for extra creaminess, they’re as adaptable as they are delicious.

Affordability is another reason to add this recipe to your baking list. Most of the ingredients are pantry staples—no need for a trip to a specialty store. With basic components like peanut butter, flour, sugar, and marshmallows, you can whip up a batch without stretching your grocery budget.

Here’s what you’ll need to make these irresistible Peanut Butter S’mores Sandwich Cookies:

Ingredients:

1 cup creamy peanut butter
1/2 cup unsalted butter, softened
3/4 cup granulated sugar
1/2 cup brown sugar, packed
1 large egg
1 tsp vanilla extract
1 1/4 cups all-purpose flour
1/2 tsp baking powder
1/2 tsp baking soda
1/4 tsp salt
12 large marshmallows (or marshmallow fluff)
1 cup semisweet chocolate chips (or chopped chocolate bars)
Graham cracker crumbs, optional (for extra s’mores flavor)

How to Prepare This Recipe – Peanut Butter S’mores Sandwich Cookies

Making these Peanut Butter S’mores Sandwich Cookies is a fun and rewarding baking project. Despite how impressive they look and taste, the process is quick, straightforward, and perfect for both beginner and experienced bakers. The combination of chewy peanut butter cookies, melted chocolate, and gooey marshmallow gives these sandwich cookies that classic s’mores magic—with a rich, nutty twist.

Step-by-Step Instructions for Preparation:

Step 1: Cream the Butters and Sugars
Start by placing the softened unsalted butter and creamy peanut butter in a large mixing bowl. Using an electric hand mixer or stand mixer, beat them together until the mixture is smooth and fluffy—about 1 to 2 minutes. This step helps create the perfect chewy cookie base.

Add in both the granulated sugar and brown sugar. Continue mixing until fully incorporated. The brown sugar brings extra moisture and depth of flavor, while the granulated sugar provides crispness.

Step 2: Add Egg and Vanilla
Crack the egg into the mixture and add the vanilla extract. Beat until just combined. You’ll start to notice the batter becoming light and creamy, which is exactly what you want for a soft yet structured cookie.

Step 3: Mix the Dry Ingredients
In a separate bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt. Slowly add the dry ingredients to the wet mixture, mixing on low speed just until no streaks of flour remain. Be careful not to overmix—doing so could result in tough cookies instead of tender ones.

Step 4: Scoop and Bake the Cookies
Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.

Use a cookie scoop or tablespoon to form uniform balls of dough—about 1 to 1.5 tablespoons each. Place them evenly on the baking sheet, spacing them about 2 inches apart. Slightly flatten the tops with the back of a spoon.

Bake for 9 to 11 minutes, or until the edges are set and the centers look just slightly underbaked. They will continue to cook as they cool, keeping the texture soft and chewy. Let them rest on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.

Step 5: Prepare the Fillings
While the cookies are cooling, melt the chocolate. You can do this by placing the chocolate chips or chopped chocolate in a heatproof bowl and microwaving in 20-second intervals, stirring in between until smooth.

If using large marshmallows, you can toast them slightly under a broiler or over a flame using a skewer—just until golden and soft. Alternatively, marshmallow fluff works wonderfully straight from the jar and doesn’t require toasting.

Step 6: Assemble the Sandwich Cookies
Pair the cookies by size to form matching tops and bottoms.

On the flat side of one cookie, spread or place a generous dollop of marshmallow or a toasted marshmallow. On the flat side of its partner, spread a layer of melted chocolate. Gently press the two together to form a sandwich. Repeat for the remaining cookies.

Optional: For an extra touch of s’mores flavor, roll the edges in crushed graham cracker crumbs while the filling is still warm and sticky.

Quick and Easy Tips:

Chill the cookie dough for 15 minutes if it feels too soft. This helps prevent spreading.
Use parchment paper for easy clean-up and perfectly golden bottoms.
To save time, make the cookies in advance and assemble just before serving.
Marshmallow fluff makes a quicker alternative and keeps the sandwiches from becoming too sticky.

Customizable Options:

These cookies are easily adaptable. You can swap the semisweet chocolate with milk or dark chocolate, depending on your taste. You can also experiment with flavored peanut butter (like honey-roasted or chocolate-infused) to create a unique twist. If allergies are a concern, sunflower seed butter is an excellent peanut-free alternative.

Popular With Many People:

These Peanut Butter S’mores Sandwich Cookies are a guaranteed crowd-pleaser. Kids love the gooey center and fun s’mores twist, while adults appreciate the rich flavor and soft texture. They’re perfect for potlucks, school events, picnics, or simply to indulge in something sweet at home. The nostalgic charm of s’mores paired with the bold, creamy taste of peanut butter creates a memorable dessert that brings everyone together.

Peanut Butter S’mores Sandwich Cookies

Print Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

No reviews

These Peanut Butter S’mores Sandwich Cookies are a fun and nostalgic dessert that merges classic peanut butter cookies with the gooey, melty essence of a traditional s’more. Each bite is packed with rich chocolate, creamy marshmallow, and a soft, chewy cookie texture. This recipe is a crowd-pleaser, simple to make, and customizable for different flavor preferences.

Author: Lura Skye
Prep Time: 20
Cook Time: 10
Total Time: 30 minutes
Yield: 12 1x

Instructions

In a large bowl, beat together softened butter and peanut butter until smooth and creamy.
Add granulated sugar and brown sugar. Mix until fully incorporated.
Beat in the egg and vanilla extract until the mixture is light and fluffy.
In a separate bowl, whisk together flour, baking powder, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
Scoop 1 to 1.5 tablespoon-sized balls of dough and place them 2 inches apart on the sheet.
Flatten each slightly with the back of a spoon.
Bake for 9–11 minutes, until edges are set and centers look slightly soft.
Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack.
While cooling, melt chocolate chips in a heatproof bowl using 20-second microwave intervals, stirring between each until smooth.
If using marshmallows, lightly toast under a broiler or over a flame until golden and soft.
Pair cookies by size. On one cookie, spread or place marshmallow. On the other, spread melted chocolate.
Gently press both cookies together to form a sandwich.
If desired, roll the edges in crushed graham cracker crumbs while the filling is still warm.

Notes

Marshmallow fluff can be used in place of toasted marshmallows.

For cleaner edges, let the assembled cookies sit for 10–15 minutes before serving.

Use dark chocolate for a more intense flavor.

For a twist, sprinkle sea salt on the melted chocolate layer before sandwiching.

FAQs – Peanut Butter S’mores Sandwich Cookies

Can I use natural peanut butter in this recipe?
Yes, you can, but keep in mind that natural peanut butter tends to be oilier and can affect the texture of the dough. For best results, use a no-stir, creamy peanut butter to maintain consistency and prevent the cookies from spreading too much.

What’s the best type of chocolate for the filling?
Semisweet chocolate chips work perfectly, but chopped chocolate bars melt more smoothly and create a richer filling. You can also use milk or dark chocolate depending on your preference.

Can I make these cookies ahead of time?
Absolutely! You can bake the cookies and store them in an airtight container for up to 3 days before assembling. Once filled, they’re best enjoyed the same day, but they can be stored in the refrigerator for up to 2 days.

Can I freeze the dough or baked cookies?
Yes, both the dough and baked cookies freeze well. Shape the dough into balls and freeze on a tray before transferring to a freezer bag. Baked cookies (without filling) can be frozen for up to 3 months.

Is marshmallow fluff a good substitute?
Definitely! It’s convenient, spreads easily, and creates that perfect gooey center without the need for toasting.