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Fudgy Hot Chocolate Brownies with Toasted Marshmallow Swirl

Close-up of a rich hot chocolate brownie square topped with toasted marshmallows and chocolate drizzle.
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Bake these rich, fudgy hot chocolate brownies that capture the cozy flavor of your favorite winter drink. This recipe includes a gooey marshmallow swirl and a toasted topping for the ultimate comfort dessert.

Ingredients

Scale
  • 1 box (18.3 ounces) brownie mix
  • Ingredients listed on brownie mix box (usually eggs, oil, water)
  • 1/2 cup hot cocoa mix (good quality)
  • 1/2 cup boiling water
  • 1/2 cup mini marshmallows (for swirl)
  • 1 cup large or mini marshmallows (for topping)
  • 1/4 cup semi-sweet chocolate chips (for drizzle)

Instructions

  1. Preheat your oven to the temperature specified on the brownie mix box. Grease and line a 9×9 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. Prepare the brownie batter according to the box directions, but substitute the required water with the 1/2 cup of hot cocoa mix dissolved in 1/2 cup of boiling water. Mix until just combined. Do not overmix.
  3. Pour half of the batter into the prepared pan. Scatter the 1/2 cup of mini marshmallows evenly over the batter layer.
  4. Gently spoon the remaining batter over the marshmallow layer. Use a knife or offset spatula to lightly swirl the layers together for a marbled effect.
  5. Bake for the time suggested on the box for fudgy brownies, checking for doneness slightly early.
  6. Remove the brownies from the oven when they are nearly set but still slightly underbaked in the center.
  7. Immediately scatter the 1 cup of topping marshmallows evenly over the hot brownie surface.
  8. Return the pan to the oven for 1 to 3 minutes, watching closely, until the marshmallows are puffed and lightly toasted. Remove immediately.
  9. Let the brownies cool completely in the pan on a wire rack.
  10. Once cool, melt the chocolate chips in a microwave-safe bowl in 30-second intervals, stirring until smooth. Drizzle the melted chocolate over the cooled brownies.
  11. Once the chocolate drizzle is set, lift the brownies out using the parchment paper overhang and cut into squares.

Notes

  • Using a high-quality hot cocoa mix makes a noticeable difference in the final chocolate flavor.
  • For the best fudgy texture, slightly underbake the brownies before adding the marshmallow topping.
  • If you do not have a broiler, you can toast the marshmallows with a kitchen torch for a more controlled browning.

Nutrition

Find it online: https://kingscook.com/hot-chocolate-brownies/