Prepare yourself for the ultimate dessert experience with these Chocolate Peanut Butter Marshmallow Cookies. Picture a thick, gooey dark chocolate cookie broken in half, revealing a perfectly toasted, snowy-white marshmallow center stretching effortlessly between the two halves. It is a sensory masterpiece.
Every bite delivers a crackly, dark brown baked surface loaded with melted dark chocolate chunks and studded with creamy, melted peanut butter chips. Beautiful peanut butter swirls are baked right into the top, creating an irresistible bakery-style finish. Served warm on a plain white ceramic plate, these cookies look as incredible as they taste.
By using professional culinary techniques, you will achieve that coveted thick center without the cookies spreading into a flat mess. The secret lies in a heavily chilled dough and strategic marshmallow placement. Get ready to bake your new favorite treat.
Why You’ll Love This Recipe
- Gooey Marshmallow Core: The fully encased marshmallow melts and toasts from the inside, creating an epic cheese-pull-style stretch when you break the cookie open.
- Double Peanut Butter Impact: Melted peanut butter chips provide texture, while creamy peanut butter swirls baked into the crust offer a savory, salty contrast to the dark chocolate.
- Perfectly Crackly Texture: The combination of baking soda and a high baking temperature creates a beautifully crinkled, dark brown surface that locks in the fudgy center.
- Ultra-Thick Structure: Chilling the dough ensures these cookies stay incredibly tall and thick, fully supporting the massive chunks of dark chocolate on top.
Ingredients & Substitutions
Dutch-Process Cocoa Powder: This is the secret to achieving that deep, dark brown cookie dough. It provides an intense chocolate flavor without the acidity of natural cocoa.
All-Purpose Flour: Forms the essential structure of the cookie. Measuring exactly 1 1/4 cups (156g) ensures the dough is sturdy enough to hold the marshmallow without becoming dry.
Unsalted Butter: Using 1/2 cup (115g) of cold, cubed butter helps the cookies maintain their thick shape in the oven. It creates steam pockets that contribute to a tender crumb.
Granulated & Brown Sugar: We use 1/2 cup (100g) of each. Brown sugar brings moisture for a gooey center, while white sugar encourages the top to crackle beautifully.
Large Marshmallows: You will need 8 large marshmallows for the centers. Do not use mini marshmallows, as they will melt away completely into the dough.
Creamy Peanut Butter: A 1/3 cup (80ml) portion is slightly warmed and swirled on top of the dough. Avoid natural peanut butters that separate, as the oil can cause the cookies to spread.
Peanut Butter Chips: You need 1/2 cup (85g) of these sweet chips. They melt perfectly into the crackly surface, adding localized bursts of peanut butter flavor.
Dark Chocolate Chunks: Use 1/2 cup (85g) of high-quality dark chocolate chunks. They puddle beautifully on top of the cookie, enhancing the visual appeal.
Eggs & Vanilla: 1 large egg plus 1 extra yolk binds the dough and adds supreme chewiness. 1 tsp (5ml) of vanilla extract rounds out the rich chocolate flavors.
Baking Powder, Baking Soda & Salt: 1 tsp (4g) baking powder gives the cookies a thick lift, while 1/2 tsp (3g) baking soda creates the crinkly crust. A 1/2 tsp (3g) of kosher salt balances the sweetness.
Equipment Needed
- Heavy-duty stand mixer or electric hand mixer
- Large baking sheets lined with parchment paper
- Large cookie scoop (3-tablespoon capacity)
- Toothpick or wooden skewer (for swirling the peanut butter)
- Wire cooling rack
Step-by-Step Instructions
1. Mix the Dry Ingredients
In a medium mixing bowl, whisk together the all-purpose flour, Dutch-process cocoa powder, baking powder, baking soda, and kosher salt. Ensure there are no lumps of cocoa powder remaining. Set this bowl aside while you prepare the wet ingredients.
2. Cream Butter and Sugars
In the bowl of your stand mixer, beat the cold, cubed butter, granulated sugar, and brown sugar on medium-high speed for 3-4 minutes. The mixture should become light, fluffy, and visibly paler in color. Scrape down the sides of the bowl with a rubber spatula.
3. Incorporate Wet Ingredients and Flour
Add the whole egg, egg yolk, and vanilla extract to the creamed butter, beating on medium speed until fully combined. Reduce the mixer speed to low and gradually add your dry ingredients. Mix just until a thick, dark chocolate cookie dough forms, being careful not to overmix.
4. Stuff the Marshmallow Centers
Take a large scoop of dough, about 3 tablespoons (45g), and flatten it into a disc in the palm of your hand. Place one large marshmallow directly in the center of the disc. Gently fold the dough up and around the marshmallow, sealing it completely so no white is visible.
5. Add Mix-ins and Peanut Butter Swirls
Press a few dark chocolate chunks and peanut butter chips gently into the top of each stuffed dough ball. Next, microwave the creamy peanut butter for 10-15 seconds until slightly runny. Drop small dots of peanut butter onto the top of the dough balls and use a toothpick to swirl it into the chocolate dough.
6. Chill and Bake
Place the formed dough balls in the refrigerator to chill for at least 30 minutes. This prevents the cookies from flattening and stops the marshmallow from blowing out the sides. Preheat your oven to 375°F (190°C) while the dough chills.
7. Bake to Perfection
Place the chilled dough balls on a parchment-lined baking sheet, spacing them 3 inches apart. Bake for 10-12 minutes. You will know they are done when the surface is dark brown and crackly, and the chocolate chunks have melted into glossy pools.
8. Cool and Serve
Let the cookies sit on the hot baking sheet for 10 minutes to set their structure. Transfer them to a wire rack to cool slightly. Serve warm on a plain white ceramic plate to enjoy the ultimate marshmallow stretch.
Expert Tips for Success
- Seal the Dough Completely: If there is even a tiny crack exposing the marshmallow before baking, it will burst out and melt onto the pan. Ensure the dark chocolate dough completely envelops the center.
- Do Not Skip Chilling: Chilling the dough solidifies the butter and cools the marshmallow. This forces the cookie to bake upwards rather than outwards, giving you that thick bakery-style profile.
- Use Block Chocolate: For the best melted dark chocolate chunks, chop a high-quality chocolate baking bar yourself. Pre-packaged chocolate chips contain stabilizers that prevent them from melting into glossy pools.
- Watch the Oven Temperature: Baking at 375°F (190°C) rather than the standard 350°F sets the edges quickly. This traps the marshmallow inside before it has a chance to turn to liquid.
Storage & Reheating/Freezing
Store any leftover baked cookies in an airtight container at room temperature for up to 3 days. To revive the gooey marshmallow center and melted peanut butter chips, microwave individual cookies for 8-10 seconds before eating.
To freeze the dough, prepare the stuffed and swirled dough balls, then freeze them solid on a baking sheet. Transfer the frozen balls to a freezer-safe bag for up to 2 months. You can bake them straight from frozen, simply adding 2-3 extra minutes to the baking time.
What to Serve With This
These decadent treats are the perfect finale to a comforting, savory meal. Start your evening with a hearty main course like steak au poivre or savory jamaican oxtail recipe. For a lighter dinner option, pair them after a fresh mediterranean steak bowls or a bright cucumber mozzarella salad.
If you are building an epic holiday dessert platter or a weekend cookie box, surround these massive stuffed cookies with contrasting flavors. Try adding zesty lemon sugar cookies, festive candy cane cookies, or sophisticated dark chocolate orange shortbread cookies to the mix. For a peanut butter lovers’ paradise, serve them alongside healthy energy cookies and a hot cup of coffee.
Frequently Asked Questions
Absolutely! You can prepare the stuffed cookie dough balls and keep them covered in the refrigerator for up to 2 days before baking. In fact, resting the dough improves the flavor and texture.
It is not recommended. Mini marshmallows melt much faster and will often dissolve completely into the dough before the cookie finishes baking, meaning you lose that signature gooey, stretchy center.
Instead of using standard chocolate chips, use chopped blocks of high-quality dark chocolate. Standard chips contain stabilizers designed to hold their shape, whereas chopped baking chocolate melts effortlessly into beautiful, glossy puddles.
Flat cookies are usually caused by butter that was too warm, expired baking powder, or skipping the crucial 30-minute chilling step. Using natural peanut butter with high oil content can also cause the cookies to spread excessively in the oven.
Marshmallows expand significantly when baked. If the dark chocolate cookie dough does not completely encase the marshmallow, or if the dough is too warm before baking, the marshmallow will break through the crust. Always chill your dough and ensure no white is exposed before baking.
Closing & Subscribe
These Chocolate Peanut Butter Marshmallow Cookies are guaranteed to become a household favorite. The combination of the dark, crackly chocolate exterior and the gooey, stretching marshmallow center is completely unmatched. The added melted peanut butter chips and swirls take the flavor profile over the top.
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Decadent Chocolate Peanut Butter Marshmallow Cookies
Ingredients
Equipment
Method
- In a medium bowl, whisk together the flour, cocoa powder, baking powder, baking soda, and kosher salt. Set aside.
- In a stand mixer, beat the cold cubed butter, granulated sugar, and brown sugar on medium-high speed for 3-4 minutes until fluffy.
- Mix in the whole egg, egg yolk, and vanilla extract. Gradually add the dry ingredients on low speed until just combined.
- Take 3 tablespoons of dough, flatten it, place a marshmallow in the center, and completely seal the dough around it.
- Press peanut butter chips and dark chocolate chunks onto the top. Drizzle warmed creamy peanut butter over the dough and swirl with a toothpick.
- Chill the formed cookies in the refrigerator for at least 30 minutes. Preheat your oven to 375°F (190°C).
- Bake on a parchment-lined baking sheet for 10-12 minutes until the edges are set and the surface is crackly and dark brown.
- Let cool on the baking sheet for 10 minutes before transferring to a wire rack. Serve warm.
Notes
Chilling the dough is mandatory to keep the cookies thick and gooey.
