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A decadent slice of Chocolate Mousse Brownies, featuring a dense brownie base topped with creamy chocolate mousse and chocolate shavings.

Chocolate Mousse Brownies

Indulge in these rich chocolate mousse brownies, a decadent dessert that combines a fudgy brownie base with a light and airy chocolate mousse topping.
Prep Time 25 minutes
Cook Time 25 minutes
Chilling Time 1 hour
Total Time 1 hour 50 minutes
Servings: 9 brownies
Course: Dessert
Cuisine: American

Ingredients
  

For the Brownies
  • 3/4 cup butter melted
  • 1 1/2 cups sugar
  • 1 tsp vanilla extract
  • 2 eggs
  • 1/2 cup cocoa powder
  • 1/2 tsp salt
  • 3/4 cup all-purpose flour
For the Mousse
  • 3/4 cup miniature marshmallows
  • 4 oz semi-sweet chocolate chopped
  • 1/4 cup milk
  • 1 cup heavy whipping cream
Optional
  • chocolate ganache for drizzling

Equipment

  • 9x9 inch baking pan
  • Stand mixer
  • saucepan
  • Large bowl

Method
 

  1. Preheat your oven to 350 degrees F. Line a 9x9 inch square baking pan with foil, allowing the foil to extend over the edges. Spray the foil generously with cooking spray and set aside.
  2. In a large bowl, combine the melted butter and sugar until smooth. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract. Finally, mix in the cocoa powder, salt, and flour until a soft batter forms.
  3. Pour the batter into the prepared pan and spread it into an even layer. Bake for 22-25 minutes, or until a toothpick inserted near the center comes out clean or with moist crumbs. Let the brownies cool completely.
  4. To make the mousse: In a large saucepan, combine the miniature marshmallows, chopped semi-sweet chocolate, and milk over low heat. Stir frequently until the ingredients melt together and the mixture is smooth. Let this chocolate mixture cool completely, about 15-20 minutes.
  5. After the chocolate mixture has cooled, whip the heavy whipping cream in a stand mixer until stiff peaks form. Gently fold the cooled chocolate mixture into the whipped cream until combined. Spread the mousse evenly over the cooled brownies. Refrigerate for at least 1 hour to allow the mousse to set.
  6. Just before serving, drizzle with chocolate ganache if desired. Store any leftovers in the refrigerator.

Notes

To make chocolate ganache: Combine 1/2 cup chocolate chips and 1/4 cup heavy whipping cream in a microwave-safe bowl. Heat on high for about 15-20 seconds, stir, and continue heating in 10-second increments until smooth.

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