Peanut Butter S’mores Sandwich Cookies

These Peanut Butter S'mores Sandwich Cookies are the ultimate nostalgic treat, combining everything you love about classic peanut butter cookies with gooey marshmallow, rich chocolate, and a twist of s'mores magic. Imagine soft, chewy peanut butter cookies cradling a sweet marshmallow fluff filling, drizzled with melted chocolate and warm peanut butter. It’s a dessert that feels like summer campfire memories baked into every bite.

This recipe is perfect for weekend baking projects, lunchbox surprises, or indulgent after-dinner snacks. It’s easy enough to make with kids and impressive enough to serve at a bake sale, holiday gathering, or dessert platter. The flavor combination hits all the notes—nutty, sweet, gooey, and chocolaty—with a touch of salt that makes them truly addictive. Get ready to elevate your cookie game with these irresistible, gooey treats!

Whether you’re a longtime fan of classic s’mores or just love a peanut butter dessert, these cookies are a must-try. They’re also endlessly customizable: swap in dark chocolate for a bolder flavor, add crushed graham crackers to the dough, or mix in mini marshmallows for added texture.

Why You’ll Love Peanut Butter S'mores Sandwich Cookies

• Soft and chewy: Perfect peanut butter cookies with a tender, melt-in-your-mouth texture.
• Classic s'mores flavor: Marshmallow fluff and chocolate make every bite nostalgic.
• Easy to make: No special tools required and simple pantry ingredients.
• Kid-friendly: Fun to make and even more fun to eat!
• Make ahead: Cookies can be baked in advance and assembled later.
• Perfect for gifting: Package them in clear bags or boxes for a thoughtful homemade gift.
• Great for parties: A standout treat for potlucks, picnics, or cookie exchanges.

Ingredients You’ll Need

For the Cookies:

• 1 ½ cups (250 g) creamy peanut butter
• ½ cup (1 stick / 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

For the Filling:

• 1 cup (96 g) marshmallow fluff
• ¼ cup (64.5 g) creamy peanut butter, warmed for drizzling
• ½ cup (84 g) milk chocolate chips

Step-by-Step Instructions

1. Prep the oven:
   • Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper or a silicone baking mat.
2. Make the cookie dough:
   • In a large bowl, use a hand mixer or stand mixer to cream together the peanut butter, butter, granulated sugar, and brown sugar until smooth and fluffy (about 2–3 minutes).
   • Add the egg and vanilla extract, beating until fully combined.
   • In a separate bowl, whisk together flour, baking powder, and salt.
   • Gradually add the dry mixture to the wet ingredients, mixing on low speed until a soft, cohesive dough forms.
3. Shape and bake the cookies:
   • Scoop 1-tablespoon portions of dough onto the prepared baking sheet, spacing them about 2 inches apart.
   • Use a fork to gently flatten each dough ball with a crisscross pattern.
   • Bake for 10–12 minutes, or until the edges are golden and the centers look just set.
   • Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
4. Melt the chocolate and assemble:
   • Place chocolate chips in a microwave-safe bowl and microwave in 20-second intervals, stirring in between, until fully melted and smooth.
   • On the flat side of one cooled cookie, spread about 1 tablespoon of marshmallow fluff.
   • Drizzle about 1 teaspoon of warm peanut butter over the marshmallow.
   • Spoon or drizzle a layer of melted chocolate over the peanut butter.
   • Top with another cookie to create a sandwich, pressing gently.
5. Let them set:
   • Let sandwiches rest at room temperature for 10–15 minutes to firm up, or place in the fridge for 10 minutes to set the chocolate faster.
   • Enjoy slightly chilled or at room temperature.

Serving and Storage Tips

These cookies are delightful as an afternoon snack or a festive dessert centerpiece. Serve them with cold milk, hot cocoa, or even a scoop of vanilla ice cream for a fun twist. They also make a lovely treat for a dessert board or seasonal baking spread.

Store leftover cookies in an airtight container at room temperature for up to 2 days. For longer storage, refrigerate for up to 5 days. To freeze, wrap each assembled cookie in plastic wrap, place in a freezer bag or container, and freeze for up to 1 month. Thaw in the refrigerator before serving.

Helpful Notes

• Don’t overbake: Cookies will continue cooking on the baking sheet. Remove them when the centers still look slightly soft.
• Warm the peanut butter just enough to drizzle easily—too hot and it will melt the marshmallow.
• Add graham cracker crumbs to the cookie dough (about ¼ cup) for a classic campfire flavor.
• Try different chocolates: Semi-sweet or dark chocolate chips give a richer contrast.
• Customize the size: Make mini versions for party trays or oversized ones for a decadent dessert.

Frequently Asked Questions

1. Can I use crunchy peanut butter? Yes! Just be aware that the cookies will have a chunkier texture and may be more difficult to sandwich.
2. Can I use marshmallows instead of fluff? You can toast large or mini marshmallows and use them instead. Place under a broiler briefly or use a kitchen torch.
3. Can I make these gluten-free? Absolutely—use a gluten-free 1:1 all-purpose flour blend and check that all other ingredients are gluten-free.
4. How can I prepare them ahead of time? Bake the cookies and store them plain. Assemble with the filling the day of serving for best texture and flavor.
5. Can I add toppings to the outside? Yes! Roll the edges in crushed graham crackers, mini chocolate chips, or sprinkles for a fun presentation.

Final Thoughts

Peanut Butter S'mores Sandwich Cookies are everything you love about s'mores and peanut butter in one irresistible bite. They’re soft, sweet, slightly salty, and filled with gooey, nostalgic flavor that satisfies every craving. Whether you’re baking for a party, prepping lunchbox treats, or treating yourself to something fun, these cookies always hit the mark.

So fire up the oven, gather your ingredients, and prepare to fall in love with this cookie creation. Happy baking!