There is nothing quite like pulling apart fresh, warm Chocolate Peanut Butter Marshmallow Cookies. The moment you break the cookie in half, you are greeted by a stretchy, gooey, melted white marshmallow center. It is a sensory experience that combines the best parts of baking into one single, decadent dessert.
This recipe was explicitly designed to deliver a thick, dark brown baked chocolate peanut butter cookie. Every bite perfectly balances the rich, slightly bitter notes of dark cocoa with the sweet, creamy bursts of melted semi-sweet chocolate chips and baked peanut butter chips.
If you crave a soft-baked texture with a slightly cracked exterior, this recipe will quickly become your ultimate go-to. Resting these beauties on wrinkled brown parchment paper over a wire cooling rack allows the edges to set while keeping the interior magically soft.
Why You’ll Love This Recipe
- Unbeatable Texture Contrast: The slightly cracked, soft-baked cookie exterior gives way to a stretchy, gooey, melted white marshmallow center.
- Intense Chocolate Flavor: Using dark cocoa powder results in a thick, dark brown chocolate cookie dough that looks and tastes bakery-tier.
- Triple the Mix-Ins: Studded with melted semi-sweet chocolate chips and baked peanut butter chips, every single bite has the perfect flavor payload.
- Visual Perfection: These cookies bake up beautifully thick, mimicking the gourmet, oversized cookies you see in high-end bakeries.
Ingredients & Substitutions
1/2 cup (113g) Unsalted Butter, softened
Butter provides the fat required to carry the rich cocoa flavors. Using unsalted butter ensures you can control the sodium levels perfectly.
1/2 cup (100g) Granulated White Sugar
White sugar encourages the cookie to spread just enough while baking. It also contributes to the slightly cracked texture on the surface.
1/2 cup (100g) Packed Light Brown Sugar
Brown sugar contains molasses, which is scientifically vital for a soft-baked texture. It helps retain moisture and keeps the thick dark brown chocolate cookie dough dense.
1 Large Egg (Room Temperature)
Eggs act as the structural binder holding the heavy dough together. Room temperature eggs emulsify much better into the butter and sugar mixture.
1 tsp (5ml) Pure Vanilla Extract
Vanilla elevates the chocolate profile by providing a floral, aromatic background note. Do not skip this, as it rounds out the bitterness of the cocoa.
1 1/2 cups (190g) All-Purpose Flour
This is the foundational structure of your cookies. Measure using a digital scale to prevent dry, crumbly dough.
1/2 cup (50g) Dark Dutch-Process Cocoa Powder
This specific cocoa powder is treated with an alkali to neutralize acidity, yielding an incredibly dark color. It is entirely responsible for the signature dark brown appearance.
1 tsp (5g) Baking Soda
Baking soda reacts with the acidic components in the dough to provide lift. This ensures your cookies are thick rather than flat.
1/2 tsp (3g) Kosher Salt
Salt acts as a flavor enhancer, amplifying the sweet notes of the marshmallow. It also balances the intense richness of the chocolate chips.
1/2 cup (85g) Semi-Sweet Chocolate Chips
These chips melt down during the baking process, creating gooey pockets. They provide a classic chocolate chip cookie feel within a dark chocolate base.
1/2 cup (85g) Peanut Butter Chips
Baked peanut butter chips add a slightly salty, nutty contrast. They maintain their shape well while still turning creamy in the oven.
12 Large White Marshmallows
You need full-sized marshmallows to achieve the dramatic, stretchy pull. Mini marshmallows will dissolve entirely into the dough.
Equipment Needed
- Electric Stand Mixer or Hand Mixer: Crucial for creaming the butter and sugars properly.
- Digital Kitchen Scale: Ensures your flour and cocoa measurements are scientifically exact.
- Large Cookie Scoop: Helps portion the dough evenly so every cookie bakes at the same rate.
- Wire Cooling Rack: Prevents the cookies from over-baking from residual pan heat.
- Wrinkled Brown Parchment Paper: Creates a non-stick surface that promotes even browning on the bottom.
Step-by-Step Instructions
1. Prepare the Dry Ingredients
In a medium bowl, whisk together the 1 1/2 cups (190g) all-purpose flour, 1/2 cup (50g) dark Dutch-process cocoa powder, 1 tsp (5g) baking soda, and 1/2 tsp (3g) kosher salt. Ensure the cocoa powder is completely sifted. You should see an even, fine, dark brown powdery mix with no lumps.
2. Cream the Butter and Sugars
In the bowl of your stand mixer, combine the 1/2 cup (113g) softened unsalted butter, 1/2 cup (100g) granulated white sugar, and 1/2 cup (100g) packed light brown sugar. Beat on medium speed for 2 to 3 minutes. The visual cue here is a noticeably lighter, aerated, and fluffy texture.
3. Incorporate the Wet Ingredients
Add the 1 large egg and 1 tsp (5ml) pure vanilla extract to the creamed butter mixture. Mix on low speed just until combined, scraping down the sides of the bowl with a rubber spatula. You want a smooth, cohesive emulsion.
4. Mix in the Dry Ingredients
Gradually pour the dry flour and cocoa mixture into the wet ingredients. Mix on the lowest speed until just a few streaks of flour remain. Do not overmix, or the cookies will become tough instead of soft-baked.
5. Fold in the Chips
Gently fold in the 1/2 cup (85g) semi-sweet chocolate chips and 1/2 cup (85g) peanut butter chips. The dough will be remarkably thick and a rich, dark brown color. It should feel slightly tacky but moldable.
6. Stuff the Cookies with Marshmallow
Scoop about 2 tablespoons of cookie dough and flatten it in the palm of your hand. Place one large white marshmallow in the center. Carefully fold the edges of the dough over the marshmallow, pinching the seams completely shut. It is critical that no white marshmallow is visible, or it will leak and burn during baking.
7. Chill the Dough
Place the stuffed dough balls on a plate and chill in the refrigerator for 30 minutes. This solidifies the butter and relaxes the gluten. Chilling is the secret to keeping the cookies thick and preventing the marshmallow from blowing out.
8. Bake to Perfection
Preheat your oven to 350°F (175°C). Line a baking sheet with wrinkled brown parchment paper and place the chilled cookie balls 3 inches apart. Bake for 10 to 12 minutes. Look for a slightly cracked exterior; the centers will still look incredibly soft.
9. Cool on a Wire Rack
Remove from the oven and allow the cookies to rest on the baking sheet for exactly 5 minutes. Transfer them carefully to a wire cooling rack. Allow them to cool slightly before pulling apart to reveal the stretchy, gooey, melted white marshmallow center.
Expert Tips for Success
- Seal the Dough Tightly: If the thick dark brown chocolate cookie dough has any gaps, the marshmallow will bubble out and caramelize on the pan. Roll the dough firmly in your hands to seal.
- Do Not Skip Chilling: Chilling the dough stops the cookies from spreading into flat puddles. This ensures a thick, soft-baked texture.
- Watch the Visual Cues: Since the dough is dark brown, it is hard to tell when they are browned. Look for slightly cracked tops and matte edges to know they are done.
- Serve Warm: The gooey melted white marshmallow center is most stretchy about 10 minutes out of the oven.
- Use Dutch-Process Cocoa: Regular natural cocoa will not yield the dramatic dark hue or the intense, fudgy flavor profile needed for this recipe.
Storage & Reheating/Freezing
Room Temperature: Store any leftover cookies in an airtight container at room temperature for up to 3 days. The soft-baked texture will remain, but the marshmallow will firm up slightly as it cools.
Reheating: To revive the stretchy, gooey center, place a cookie on a microwave-safe plate. Microwave on high for 8 to 10 seconds. The marshmallow will instantly return to its freshly-baked glory.
Freezing: You can freeze the raw, stuffed dough balls in a freezer-safe bag for up to 3 months. When craving a treat, bake directly from frozen, adding an extra 2 to 3 minutes to the total baking time.
What to Serve With This
These decadent Chocolate Peanut Butter Marshmallow Cookies demand to be the star of your dessert table. If you are hosting a large gathering, consider pairing them with other rich, crowd-pleasing sweets. They look phenomenal sitting next to a slice of caramel brownie cheesecake or alongside some brightly colored pink sugar cookie bars.
If you prefer a varied dessert spread with contrasting flavors, serve these rich chocolate treats alongside a fruit-forward homemade apple pie recipe or some simple, elegant lemon blueberry pound cake. The tanginess of the fruit perfectly cuts through the heavy, gooey melted marshmallow center.
Planning a cozy family dinner? Start with comforting savory mains before bringing out these cookies. Serve a hearty bowl of tuscan sausage and potato soup or dive into a plate of million dollar italian lasagna. If you want something quick, air fryer garlic parmesan chicken makes a fantastic weeknight meal that leaves plenty of time for baking dessert.
For an elevated coffee date, pair these stuffed cookies with a warm beverage and a delicate earl grey panna cotta. Or, keep the peanut butter theme going by offering a slice of classic peanut butter cake and a plate of chocolate crinkle cookies. Your guests will be blown away by the slightly cracked, soft-baked texture.
FAQ
It is not recommended. Mini marshmallows tend to completely melt and dissolve into the dough during baking, preventing you from getting that signature stretchy, gooey center.
While you can substitute natural cocoa powder, using Dutch-process cocoa is essential if you want the cookies to have that intense, bakery-style dark brown color and a smoother, less acidic chocolate flavor.
To prevent leaks, you must completely encase the marshmallow in the thick dark brown chocolate cookie dough. Pinch the seams tightly so no white shows, and do not skip chilling the dough.
Simply place a room-temperature cookie in the microwave for 8 to 10 seconds. The marshmallow will instantly soften, returning to its stretchy, freshly-baked texture.
Cookies usually spread if the butter was too warm, the flour was under-measured, or the dough was not chilled. Ensure you chill the stuffed cookie dough balls for a full 30 minutes before baking.
Closing & Subscribe
These Chocolate Peanut Butter Marshmallow Cookies deliver a truly unforgettable dessert experience. From the thick dark brown chocolate cookie dough to the stretchy, gooey melted white marshmallow center, every element is designed to impress. The combination of melted semi-sweet chocolate chips and baked peanut butter chips guarantees that every bite is bursting with flavor.
If you loved baking this soft-baked, indulgent treat, please leave a comment and a 5-star rating below! Do not forget to subscribe to our newsletter for more bakery-quality recipes delivered straight to your inbox. Pin this recipe to your favorite dessert boards to save it for your next baking adventure!
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Chocolate Peanut Butter Marshmallow Cookies
Ingredients
Equipment
Instructions
- In a medium bowl, whisk together the 1 1/2 cups (190g) all-purpose flour, 1/2 cup (50g) dark Dutch-process cocoa powder, 1 tsp (5g) baking soda, and 1/2 tsp (3g) kosher salt.
- In the bowl of your stand mixer, combine the 1/2 cup (113g) softened unsalted butter, 1/2 cup (100g) granulated white sugar, and 1/2 cup (100g) packed light brown sugar. Beat on medium speed for 2 to 3 minutes.
- Add the 1 large egg and 1 tsp (5ml) pure vanilla extract to the creamed butter mixture. Mix on low speed just until combined.
- Gradually pour the dry flour and cocoa mixture into the wet ingredients. Mix on the lowest speed until just a few streaks of flour remain.
- Gently fold in the 1/2 cup (85g) semi-sweet chocolate chips and 1/2 cup (85g) peanut butter chips. The dough will be remarkably thick and a rich, dark brown color.
- Scoop about 2 tablespoons of cookie dough and flatten it. Place one large white marshmallow in the center. Carefully fold the edges of the dough over the marshmallow, pinching the seams completely shut.
- Place the stuffed dough balls on a plate and chill in the refrigerator for 30 minutes.
- Preheat oven to 350°F (175°C). Place the chilled cookie balls 3 inches apart on wrinkled brown parchment paper. Bake for 10 to 12 minutes.
- Allow the cookies to rest on the baking sheet for exactly 5 minutes, then transfer to a wire cooling rack.
Notes
Do Not Skip Chilling: Chilling prevents the cookies from spreading too much.
Use Dutch-Process Cocoa: This is crucial for the dark brown color and rich flavor.
