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Fudgy Hot Chocolate Brownies with Toasted Marshmallow Topping

Close-up of a fudgy hot chocolate brownie slice topped with perfectly toasted marshmallows and visible chocolate chunks.

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Bake these rich, fudgy brownies that capture the cozy flavor of your favorite hot chocolate. We use hot chocolate mix in the batter for deep flavor and top them with gooey, toasted marshmallows for the ultimate winter treat.

Ingredients

Scale
  • 1 box (18.3 ounces) of your favorite brownie mix
  • Ingredients listed on the brownie mix box (usually eggs, oil, water)
  • 1/2 cup good quality hot chocolate mix (not just plain cocoa powder)
  • 1 cup semi-sweet chocolate chips
  • 1 cup mini marshmallows (for swirling)
  • 1 cup mini marshmallows (for topping)

Instructions

  1. Preheat your oven to the temperature directed on the brownie mix box. Grease and line a 9×13 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. Prepare the brownie batter according to the box instructions, substituting the recommended amount of hot chocolate mix for some of the dry ingredients, or simply stirring it into the wet ingredients as directed by the box. Mix until just combined.
  3. Stir in the 1 cup of chocolate chips into the batter.
  4. Pour half of the batter into the prepared pan. Sprinkle the 1 cup of swirling marshmallows evenly over the batter layer. Top with the remaining batter.
  5. Bake for the time suggested on the box. About 5 minutes before the brownies are done, remove them from the oven and quickly sprinkle the remaining 1 cup of marshmallows over the top.
  6. Return the pan to the oven and bake until the marshmallows are puffed and lightly golden brown, watching closely to prevent burning.
  7. Remove the pan from the oven and let the brownies cool completely in the pan on a wire rack before lifting out and cutting into squares.
  8. For the toasted marshmallow topping, place the cooled brownies under a broiler for 30 to 60 seconds, watching constantly until the marshmallows toast to your liking. Serve immediately after toasting.

Notes

  • Using a box mix hack keeps this recipe simple for busy weeknights.
  • For an extra rich flavor, substitute the oil listed on the box with melted butter.
  • If you do not wish to toast the marshmallows under the broiler, you can use a kitchen torch for more controlled browning.

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