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

Chocolate Mousse Brownies

This recipe combines rich chocolate brownies with a light and airy chocolate mousse for a decadent dessert. It's perfect for satisfying your chocolate cravings and impressing your friends.
Prep Time 25 minutes
Cook Time 25 minutes
Chilling Time 1 hour
Total Time 1 hour 50 minutes
Servings: 9 servings
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
  • 1 chocolate ganache for drizzling optional

Equipment

  • 9x9" square baking pan
  • large bowl
  • Saucepan
  • Stand mixer

Method
 

  1. Preheat your oven to 350 degrees F. Line a 9x9" square baking pan with foil, letting the foil extend over the edges. Spray the foil with cooking spray and set aside.
  2. In a large bowl, mix 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, add the cocoa powder, salt, and flour, mixing until a soft batter forms.
  3. Pour the batter into the prepared pan and spread it evenly. 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 chocolate, and milk over low heat. Stir often until the ingredients melt and the mixture is smooth. Let it cool completely, about 15-20 minutes.
  5. After the chocolate mixture has cooled, whip the heavy cream in a stand mixer until stiff peaks form. Gently fold the cooled chocolate mixture into the whipped cream until combined. Spread this 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 you like. 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 15-20 seconds, stir, and continue heating in 10-second increments until smooth.

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