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Chocolate Mousse Brownies – Rich, Creamy & Perfect for Parties

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These Chocolate Mousse Brownies feature a dense, fudgy brownie base topped with a light, airy chocolate mousse — the ultimate layered dessert for chocolate lovers.

Ingredients

Scale

For the Brownies:

  • 1/2 cup unsalted butter

  • 6 oz semisweet chocolate, chopped

  • 3/4 cup granulated sugar

  • 1/4 cup brown sugar

  • 2 large eggs

  • 1 tsp vanilla extract

  • 3/4 cup all-purpose flour

  • 1/4 cup cocoa powder

  • 1/4 tsp salt

For the Mousse:

  • 6 oz dark or semisweet chocolate, chopped

  • 2 egg yolks

  • 2 tbsp sugar

  • 1 cup heavy cream (divided)

  • 1 tsp gelatin (optional)

  • 1 tsp vanilla extract

Instructions

  • Preheat oven to 350°F (175°C). Line an 8×8-inch pan with parchment paper.

  • Melt butter and chocolate, cool slightly. Whisk in sugars, eggs, and vanilla.

  • Fold in flour, cocoa, and salt. Bake 25–28 minutes. Cool completely.

  • For mousse: Melt chocolate; set aside. Whisk yolks, sugar, and 1/3 cup cream in a saucepan until slightly thickened.

  • Combine with melted chocolate. If using gelatin, dissolve and stir in.

  • Whip remaining cream to soft peaks; fold into cooled chocolate mixture.

  • Spread mousse over cooled brownies. Chill 4 hours or overnight.

  • Dust with cocoa or top with chocolate shavings before slicing