If you’re looking for a cookie that combines creamy peanut butter, gooey marshmallows, and a touch of sweetness with crunchy oats, you have to try this Peanut Butter Marshmallow Cookies Recipe. It’s the perfect treat that blends comforting flavors and textures into every bite, with a delightful marshmallow surprise on top that makes these cookies utterly unforgettable. Whether you’re baking for a crowd or just to satisfy your own sweet tooth, this recipe promises moist, chewy cookies with a luscious peanut butter drizzle that takes it over the edge. Let’s dive into crafting these irresistible cookies that bring joy with each bite!

Ingredients You’ll Need

The image shows 13 white small square dishes and one white round small dish arranged in a rough circle on a white marbled surface. In the center is a yellow block of butter. Around it, starting from the top left and moving clockwise, are dishes filled with white granulated sugar, brown sugar, fine salt, baking powder, one white marshmallow next to a small round dish with white coconut oil, white flour, rolled oats, a white egg in a dish, light brown vanilla extract, dark chocolate chips, peanut butter chips, and peanut butter. Each ingredient is clearly visible with distinct colors and textures. Photo taken with an iphone --ar 4:5 --v 7

The beauty of this Peanut Butter Marshmallow Cookies Recipe is how straightforward and approachable the ingredients are. Each one plays a vital role—flour and oats provide structure and a subtle chew, while peanut butter and sugars build rich flavor and perfect sweetness. Marshmallows add that ooey-gooey element that makes every bite exciting, and the peanut butter chips finish things off with a luscious drizzle topping.

1 cup all-purpose flour: The base for your cookies’ structure, ensuring they hold together beautifully.
1/3 cup old-fashioned oats (blended): Adds chewy texture and a hint of wholesome flavor throughout.
1 teaspoon baking soda: Helps your cookies rise just enough, creating a tender crumb.
½ teaspoon kosher salt: Enhances all the flavors and balances the sweetness.
1 cup peanut butter (smooth): The star ingredient, giving these cookies their rich, creamy essence.
½ cup + 2 Tablespoons brown sugar: Adds warmth and moisture, deepening the flavor profile.
1/3 cup granulated sugar: Balances the brown sugar, providing a slight crispness to edges.
1 cup unsalted butter (melted): Introduces richness and helps achieve a soft, chewy texture.
2 eggs (cold): Bind everything together and add a bit of body to the dough.
¾ teaspoons vanilla: Brings out sweetness and rounds out the overall flavor beautifully.
13 large marshmallows (cut in half): The magic gooey pockets that make these cookies so special.
4 ounces peanut butter chips: For a smooth, creamy drizzle that complements the marshmallow topping.
1 teaspoon coconut oil: Helps melt the peanut butter chips into a silky glaze.

How to Make Peanut Butter Marshmallow Cookies Recipe

A clear white bowl filled with thick, light brown batter that has a slightly uneven texture with some small bumps, sitting on a white marbled surface. Next to the bowl is a pair of metal beaters covered with the same batter, resting on the white marbled surface. The batter looks smooth but dense, with swirled ridges made by mixing. Photo taken with an iphone --ar 4:5 --v 7

Step 1: Prep Your Oven and Baking Sheet

Start by preheating your oven to 350°F. Line your baking sheet with parchment paper or a Silpat mat; this prevents sticking and ensures an even bake. Getting this setup right at the start makes the entire baking process smoother.

Step 2: Combine Dry Ingredients

In a small bowl, whisk together the flour, blended oats, baking soda, and kosher salt. This mixture creates the perfect foundation that will give your cookies structure and a subtle heartiness from the oats.

Step 3: Mix Wet Ingredients

In a large mixing bowl, combine the peanut butter, brown sugar, granulated sugar, and melted butter. Use a hand mixer on high speed to whip them until fluffy — about 2 minutes. This will help incorporate air, ensuring your cookies stay soft and tender. Then, add the cold eggs and vanilla, mixing until everything is fully combined.

Step 4: Bring It All Together

Slowly add the dry ingredient mixture to the wet ingredients and mix on low speed until just combined. This careful mixing prevents overworking the dough, which helps keep the cookies tender.

Step 5: Scoop and Bake the Cookies

Using a #40 cookie scoop, portion out dough into balls and place about 12 on each cookie sheet. Bake the cookies at 350°F for 8 minutes. Then remove the pan and gently press a half marshmallow into the center of each cookie. Slide the baking sheet back into the oven and bake for an additional 2 minutes, allowing the marshmallows to melt slightly and become beautifully gooey.

Step 6: Add the Final Touch

Allow the cookies to cool completely on the baking sheet. Meanwhile, melt the peanut butter chips and coconut oil together in the microwave for about 30 seconds until silky smooth. Drizzle this luscious peanut butter glaze over each marshmallow-topped cookie using a small spoon. Let the drizzle set for several minutes before indulging.

How to Serve Peanut Butter Marshmallow Cookies Recipe

Garnishes

To make your Peanut Butter Marshmallow Cookies Recipe look even more inviting, consider sprinkling a few crushed peanuts or a pinch of flaky sea salt on top of the peanut butter drizzle. This adds an appealing crunch and a delightful salty contrast to the chewy sweetness.

Side Dishes

These cookies shine alongside a cold glass of milk or a warm cup of your favorite coffee or tea. If you want to elevate your snack time, serve the cookies with vanilla ice cream or a scoop of creamy peanut butter frozen yogurt for a decadent treat.

Creative Ways to Present

Try stacking the cookies in a rustic wooden box lined with parchment paper for a charming gift presentation, or arrange them on a colorful platter dusted with powdered sugar. You can also create a cookie sandwich by adding a spoonful of marshmallow fluff or peanut butter frosting between two cookies for an extra indulgent twist.

Make Ahead and Storage

Storing Leftovers

Keep any leftover Peanut Butter Marshmallow Cookies Recipe in an airtight container at room temperature for up to 4 days. They maintain their soft texture but be sure to enjoy them soon to catch that perfect gooey marshmallow moment!

Freezing

You can freeze the baked cookies by placing them in a single layer on a baking sheet until firm, then transferring them to a zip-top freezer bag. Freeze for up to 2 months. When ready to enjoy, thaw them at room temperature to preserve their chewy texture and gooey marshmallows.

Reheating

To revive that fresh-baked warmth, microwave a cookie for 10-15 seconds or warm in a low oven (300°F) for about 5 minutes. This lets the marshmallow get soft again and the peanut butter drizzle glisten delightfully.

FAQs

Can I use crunchy peanut butter instead of smooth?

Absolutely! Crunchy peanut butter will add a bit more texture to the cookies, which can be a nice twist if you love little peanut bits throughout your treat.

What can I substitute for old-fashioned oats?

If you don’t have oats, you can omit them, but they do add chewiness. Alternatively, finely ground oats or even oat flour can be used to keep the texture close to the original.

Are there any allergy-friendly modifications for this recipe?

If peanut allergies are a concern, try swapping peanut butter with sunflower seed butter or almond butter, but note this will change the flavor. Ensure marshmallows you use are gelatin-free if needed for dietary restrictions.

Can I make the cookie dough ahead of time?

Yes! You can prepare the dough and refrigerate it for up to 24 hours before baking. This can even enhance the flavors as they meld together.

Why do I add marshmallows halfway through baking?

Adding marshmallows mid-bake prevents them from burning and allows them to melt perfectly into gooey pockets right on top of the cookies.

Final Thoughts

There’s something truly special about this Peanut Butter Marshmallow Cookies Recipe. It’s a warm hug of a cookie that combines classic flavors with a delightful gooey twist that always leaves me reaching for another. Whether you’re sharing with family, friends, or indulging solo, these cookies have a way of brightening up any day. I can’t wait for you to try them and discover your own little piece of cookie heaven!