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Crumbl chocolate mallow cupcake cookies
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5 from 24 votes

Crumbl chocolate mallow cupcake cookies

These Mallow Fluff cookies are a play on the hostess chocolate cupcake treats. It is made with a thick chocolate cookie filled with marshmallow fluff and decorated with chocolate ganache and white chocolate swirls.
Prep Time20 minutes
Cook Time12 minutes
Total Time32 minutes
Course: Dessert
Cuisine: American
Servings: 8 cookies
Calories: 422Calories


  • ½ cup butter softened
  • ¾ cup brown sugar
  • 2 tablespoon granulated sugar
  • 1 large egg
  • 2 teaspoon vanilla extract
  • 1 & ½ cup flour
  • ½ cup dutch processed cocoa powder
  • ½ teaspoon baking soda
  • ¼ teaspoon salt
  • cup marshmallow fluff
  • 4 oz semi sweet chocolate chips (⅔ cup chocolate chips)
  • 2 tablespoon heavy cream
  • ½ oz white chocolate (1 & ½ tablespoon chocolate chips)


  • Using a 1 teaspoon measuring spoon, scoop out 8 equally sized rounded teaspoons of marshmallow fluff onto a plastic-wrapped plate or baking sheet and freeze for 20-30 minutes or until solid.

Make the cookie dough

  • Start by preheating the oven to 350F and line a baking sheet with parchment paper and set aside.
  • Cream the butter, brown sugar, and granulated sugar together until creamy.
  • Mix in the egg, and vanilla extract until combined, then add in the flour, baking soda, cocoa powder, and salt and mix just until combined.
  • Scoop out 8 equally sized cookie dough balls, flatten them between the palm of your hands and place the frozen marshmallow fluff in the center before gently folding the cookie dough over it and seal it. Roll the cookie dough between the palm of your hands to make sure everything is well sealed.
    Filling a chocolate cookie with marshmallow fluff
  • Bake the cookies in the preheated oven for 10 minutes then let cool on the baking sheet for another 10 minutes then transfer to a cooling rack.

Make the chocolate ganache topping

  • Melt the chocolate chips and the heavy cream together in a small bowl in the microwave in 30-second increments, mixing every time. Top the cookies with a dollop of chocolate ganache and spread it on top.
  • In a small bowl melt the white chocolate then transfer it to a piping bag with a fine tip or a ziplock bag with the tip cut off and decorate the cookies with the white chocolate swirls and enjoy!
    Crumbl chocolate mallow cupcake cookies


Help, my cookies are bursting! 

When filing your chocolate cookie dough make sure to seal it well then roll it between the palm of your hand to make sure that all the little cracks are sealed. Make sure to also only use 1- 1 & ½ teaspoon of marshmallow fluff per cookie.  

How to store Crumbl mallow fluff cookies?

You can store these cookies in an airtight container in the fridge for up to 5 days.
You can also freeze them for up to 3 months in an airtight container.
Just make sure to bring it down to room temperature before enjoying it!


Calories: 422Calories | Carbohydrates: 57g | Protein: 5g | Fat: 20g | Saturated Fat: 12g | Trans Fat: 1g | Cholesterol: 60mg | Sodium: 263mg | Potassium: 236mg | Fiber: 4g | Sugar: 33g | Vitamin A: 451IU | Vitamin C: 1mg | Calcium: 49mg | Iron: 3mg