Chocolate Marshmallow Swirl Cookies are rich, chocolatey delights with a swirl of gooey marshmallow, combining the best of brownie-like cookies with the irresistible taste of marshmallow.

These cookies have a fudgy center, a hint of vanilla, and are finished with a marshmallow swirl for an extra layer of decadence. Perfect for chocolate lovers, these cookies are great for cozy evenings, get-togethers, or whenever you’re craving a unique treat with some texture and sweetness.

Kitchen Equipment Needed

Mixing Bowls – For combining ingredients.
Baking Sheets – To bake the cookies.
Parchment Paper – For non-stick baking and easy cleanup.
Electric Mixer – For creaming butter and sugar.
Rubber Spatula – For folding in marshmallow fluff.

Ingredients Overview

Butter – Adds richness and flavor.
Dark Chocolate – Gives a deep chocolate flavor; use high-quality chocolate for the best results.
Marshmallow Fluff – Creates the signature swirl and adds a gooey texture.
Brown Sugar – Adds moisture and a slight caramel-like taste.
Cocoa Powder – Enhances the chocolate depth.
Vanilla Extract – Complements the chocolate and marshmallow flavors.

Ingredients

1/2 cup (1 stick) unsalted butter
1 cup dark chocolate chips or chopped dark chocolate
1 cup granulated sugar
1/2 cup light brown sugar, packed
2 large eggs
1 teaspoon vanilla extract
1 1/4 cups all-purpose flour
1/4 cup unsweetened cocoa powder
1/2 teaspoon baking soda
1/2 teaspoon salt
1/2 cup marshmallow fluff

Step-by-Step Instructions

Preheat Oven and Prepare Baking Sheets
Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.
Melt the Butter and Chocolate
In a heatproof bowl, melt the butter and chocolate together in the microwave in 30-second intervals, stirring in between until smooth and fully melted. Let it cool slightly.
Mix Sugars and Eggs
In a large mixing bowl, combine the granulated sugar, brown sugar, and the melted butter-chocolate mixture. Use an electric mixer to blend until smooth. Add in the eggs and vanilla extract, mixing until well combined.
Combine Dry Ingredients
In a separate bowl, whisk together the flour, cocoa powder, baking soda, and salt. Gradually add the dry ingredients to the wet mixture, mixing on low speed until just combined.
Add the Marshmallow Swirl
Gently fold in the marshmallow fluff using a rubber spatula. Avoid overmixing to keep visible swirls of marshmallow in the dough.
Form Cookies and Bake
Scoop the dough onto the prepared baking sheets, leaving about 2 inches of space between each cookie. Bake for 10–12 minutes, until the edges are set but the centers are still soft. The marshmallow should create beautiful swirls on top of each cookie.
Cool and Enjoy
Allow the cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack. Enjoy while warm for the best gooey texture!

Recipe Tips

Marshmallow Fluff Tip: Dollop small amounts into the dough rather than stirring too vigorously, which helps achieve a defined swirl.
Do Not Overbake: Keep an eye on the baking time. Overbaking can result in a dry texture, so take them out when the centers are slightly soft.
Chill Dough If Needed: If your dough becomes too sticky to handle, chilling it for 15 minutes can make it easier to work with.

What to Serve With This Recipe

Serve these cookies with a glass of cold milk, hot chocolate, or even a scoop of vanilla ice cream for an indulgent treat. They’re also great served warm with coffee or hot tea for a cozy snack.

Frequently Asked Questions

Q: Can I make these cookies ahead of time?
A: Yes, you can make the dough up to 24 hours in advance and keep it covered in the refrigerator. Allow it to come to room temperature before baking.

Q: Can I use mini marshmallows instead of marshmallow fluff?
A: Marshmallow fluff is preferred for the best swirl effect, but if using mini marshmallows, press a few into the top of each cookie before baking.

Q: How do I store these cookies?
A: Store them in an airtight container at room temperature for up to 3 days. For longer storage, freeze the cookies in a single layer.

Serving Suggestions

These cookies are delicious on their own but can be elevated by serving with hot drinks or pairing with ice cream. They’re also wonderful alongside fresh berries for a slightly tart contrast.

Ingredients

1/2 cup unsalted butter
1 cup dark chocolate chips
1 cup granulated sugar
1/2 cup light brown sugar
2 large eggs
1 teaspoon vanilla extract
1 1/4 cups all-purpose flour
1/4 cup cocoa powder
1/2 teaspoon baking soda
1/2 teaspoon salt
1/2 cup marshmallow fluff

Instructions

Preheat oven to 350°F (175°C). Line baking sheets with parchment paper.
Melt butter and chocolate, then mix in sugars. Add eggs and vanilla.
Combine dry ingredients separately; add to wet mixture.
Fold in marshmallow fluff to create swirls.
Scoop dough onto sheets and bake for 10–12 minutes.
Cool and enjoy your delicious Chocolate Marshmallow Swirl Cookies!