Name: Peanut Butter S’mores Sandwich Cookies Recipe
Prep time: 20 min
Cook time: 12 min
Total time: 45 min
Cuisine: American
Ingredients: 1 ½ cups (250 g) creamy peanut butter; ½ cup (113 g) unsalted butter, softened; ½ cup (100 g) granulated sugar; ½ cup (100 g) light brown sugar, packed; 1 large egg, room temperature; 1 teaspoon vanilla extract; 1 ¼ cups (160 g) all-purpose flour; ¾ teaspoon baking powder; ¼ teaspoon kosher salt; 1 cup (96 g) marshmallow fluff; ¼ cup (64.5 g) creamy peanut butter, warmed; ½ cup (84 g) milk chocolate chips

Jump to Recipe

If you’re looking for a nostalgic treat that’s equal parts fun and irresistible, these Peanut Butter S’mores Sandwich Cookies are about to become your new favorite obsession. Imagine the classic campfire flavors of gooey marshmallows, creamy peanut butter, and rich milk chocolate, all nestled between tender, crisscrossed peanut butter cookie rounds. This recipe is a flavor-packed adventure, perfect for sharing with friends, treating the kids, or indulging in a little “just because you can” sweetness. Get ready for a dessert that brings all the joy of s’mores—no fire required!

Peanut Butter S’mores Sandwich Cookies Recipe - Recipe Image

Ingredients You’ll Need

You won’t believe how easy it is to create something magical with such a short and sweet ingredient list. Each element here plays a key role in ensuring that every bite is soft, chewy, and completely crave-worthy, with some serious s’mores energy in every layer.

Creamy Peanut Butter: The heart of both the dough and the filling, lending richness and a nutty punch.
Unsalted Butter: Softened butter is key for that beautifully tender cookie crumb.
Granulated Sugar: Sweetens the cookies and helps achieve a classic peanut butter cookie texture.
Light Brown Sugar: Adds moisture and a hint of caramel depth you’ll taste in every bite.
Large Egg: Room temperature is best for even mixing and a soft, unified dough.
Vanilla Extract: Brings warmth and rounds out the flavor profile.
All-Purpose Flour: Just enough to hold our cookies together—don’t overdo it!
Baking Powder: Lifts the cookies so they stay tender, not dense.
Kosher Salt: Balances the sweet and amps up the peanut flavor.
Marshmallow Fluff: This is your oozy, sticky tribute to classic s’mores goodness.
Milk Chocolate Chips: Melted to silky perfection for that unmistakable chocolate layer.
Extra Creamy Peanut Butter (for filling): Warmed gently—it helps meld everything together in the sandwich.

How to Make Peanut Butter S’mores Sandwich Cookies

Step 1: Make the Cookie Dough

Kick things off by creaming together your peanut butter, softened butter, granulated sugar, and light brown sugar until the mixture looks pale and fluffy—about 2 to 3 minutes with a hand or stand mixer. This step is crucial for getting that dreamy, melt-in-your-mouth texture that makes the cookie half of these Peanut Butter S’mores Sandwich Cookies so utterly addictive.

Step 2: Add Egg and Vanilla

Crack in your egg and pour in the vanilla extract. Blend until just combined. The egg ties everything together, while vanilla brings in that cozy, sweet aroma you’ll notice as soon as these cookies hit the oven.

Step 3: Mix in the Dry Ingredients

In a separate bowl, whisk together your flour, baking powder, and salt. Gradually add this dry mixture into the wet ingredients on low speed. You’re looking for a soft, perfect dough—scrape down the sides as needed to ensure every bit is well incorporated.

Step 4: Shape and Bake

Scoop your dough into generous 1-tablespoon portions, leaving plenty of room on a parchment-lined baking sheet. Flatten each mound gently with a fork in that classic crisscross pattern (it’s tradition!). Bake at 350°F (175°C) for 10 to 12 minutes. The edges should be just golden, while the centers stay soft. Rest on the tray for 5 minutes, then transfer to a rack to cool completely.

Step 5: Prepare the Chocolate Filling

Pop your milk chocolate chips into a microwave-safe bowl and melt in short 20-second bursts, stirring between each, until completely smooth. Don’t rush it—chocolate is happier when you take things slow!

Step 6: Assemble and Sandwich

Spread about a tablespoon of marshmallow fluff onto the base of one cookie, then drizzle with a teaspoon of warm, creamy peanut butter and a layer of melted chocolate. Place a second cookie on top and gently press to form the perfect sandwich. Let your Peanut Butter S’mores Sandwich Cookies set for 10 to 15 minutes at room temperature (or chill for 10 minutes if you simply can’t wait). Voilà—dessert dreams realized!

How to Serve Peanut Butter S’mores Sandwich Cookies

Garnishes

For a special touch, roll the edges of your sandwich cookies in mini chocolate chips, sprinkles, or even crushed graham crackers. A tiny pinch of flaky sea salt on top also makes the flavors pop!

Side Dishes

These cookies are a star all on their own, but they’re absolute magic alongside a tall glass of cold milk or a frothy mug of hot chocolate. For grown-up gatherings, serve them with strong coffee or a mug of spiced chai for a cozy finish to any meal.

Creative Ways to Present

Stack your Peanut Butter S’mores Sandwich Cookies high on a rustic cake stand for a beautiful, bakeshop-style centerpiece. You can also wrap each one in parchment and twine for an adorable take-home treat at potlucks or parties. Or, nestle them in a picnic basket for a next-level outdoor snack with serious wow factor.

Make Ahead and Storage

Storing Leftovers

Store any leftover Peanut Butter S’mores Sandwich Cookies in an airtight container at room temperature for up to three days. If your kitchen is a bit warm, you might prefer to keep them in the fridge so the chocolate and marshmallow stay perfectly set.

Freezing

Great news—these cookies freeze beautifully! Simply wrap individually in plastic wrap and store in a freezer-safe container for up to 2 months. Thaw at room temperature and enjoy whenever your sweet tooth strikes.

Reheating

Want that just-made gooeyness again? Pop a cookie in the microwave for about 8 to 10 seconds—just enough to soften the marshmallow and chocolate without melting the whole thing. It’s s’more-magic, on demand.

FAQs

Can I use crunchy peanut butter instead of creamy?

Absolutely! Crunchy peanut butter adds extra texture and a subtle nutty crunch. Just keep in mind your dough may be a bit thicker, so give the cookies a slightly heavier press with your fork when shaping.

Is marshmallow fluff the same as melted marshmallows?

They’re similar, but marshmallow fluff is softer and spreadable, which makes it ideal for sandwich cookies. If you only have regular marshmallows, you can melt them down, but the texture will be a bit stickier and less smooth.

How do I keep my cookies from spreading too much?

If your cookies are spreading more than you’d like, try chilling the dough for 20–30 minutes before scooping and baking. This keeps them thick and chewy—perfect for stacking into sandwiches.

Can I make Peanut Butter S’mores Sandwich Cookies gluten-free?

Definitely! Swap in your favorite gluten-free all-purpose flour blend. Check that your marshmallow fluff and chocolate chips are gluten-free as well, and you’re set for a perfect batch.

What’s the best way to transport these cookies for a picnic or potluck?

Let your Peanut Butter S’mores Sandwich Cookies set completely, then wrap each in parchment and store in a sturdy container. They’ll survive the trip even on warm days, and unwrapping them feels like opening a present!

Final Thoughts

If you’re ready to wow your friends (or just treat yourself!), whip up a batch of Peanut Butter S’mores Sandwich Cookies and savor every gooey, nostalgic bite. There’s something about that combo of peanut butter, chocolate, and marshmallow that simply never gets old. Happy baking—you’re going to love these!