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Chocolate mousse brownies with three rich layers—fudgy brownie base, creamy chocolate mousse center, and glossy chocolate ganache topped with chocolate shavings.

Chocolate Mousse Brownies

These indulgent Chocolate Mousse Brownies feature a dense, chewy fudge brownie base topped with a thick layer of light, airy chocolate mousse and a silky ganache finish. A stunning triple-layer dessert.
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Prep Time 30 minutes
Cook Time 25 minutes
Total Time 3 hours 55 minutes
Servings: 9 g
Course: Dessert
Cuisine: American
Calories: 420
Ingredients Equipment Method Notes

Ingredients
  

  • ½ cup unsalted butter Melted
  • 1 cup granulated sugar For brownie
  • 2 large eggs Room temperature
  • 1 teaspoon vanilla extract Divided use
  • ⅓ cup unsweetened cocoa powder Dutch process
  • ½ cup all-purpose flour Sifted
  • ¼ teaspoon salt Balances flavor
  • 1 ½ cups heavy whipping cream Cold, for mousse
  • 1 cup semi-sweet chocolate chips Melted and cooled for mousse
  • ¼ cup powdered sugar For mousse
  • ½ cup chocolate chips For ganache
  • ¼ cup heavy cream Hot, for ganache
  • 2 tablespoon chocolate shavings Garnish

Equipment

  • 1 Baking pan 8x8 inch
  • 1 Electric mixer Hand or stand
  • 3 Mixing bowls Medium
  • 1 Offset spatula For smooth layers

Method
 

  1. Preheat oven to 350°F and line an 8x8 inch pan with parchment paper.
  2. Whisk melted butter, sugar, eggs, and vanilla; stir in cocoa, flour, and salt.
  3. Bake for 20–25 minutes; let cool completely in the pan.
  4. Whip heavy cream and powdered sugar to stiff peaks; fold in cooled melted chocolate.
  5. Spread mousse over cooled brownies and refrigerate for 30 minutes.
  6. Pour hot cream over chocolate to make ganache; spread over mousse and chill for 3 hours.
  7. Top with chocolate shavings, slice with a hot knife, and serve.

Notes

Ensure the brownie base is completely cool before adding the mousse layer to prevent melting. Use a hot knife to slice for clean, bakery-style edges.