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The best chocolate mousse brownies decadent easy recipe featuring dense chocolate brownies layered with light fluffy chocolate mousse. A stunning dessert for parties and special occasions.
For the Brownie Layer
1 cup unsalted butter, melted
1 ½ cups granulated sugar
4 large eggs
1 teaspoon vanilla extract
1 cup all-purpose flour
½ cup unsweetened cocoa powder
½ teaspoon salt
½ teaspoon baking powder
For the Chocolate Mousse
1 ½ cups heavy whipping cream
1 cup semi-sweet chocolate chips
½ teaspoon vanilla extract
¼ cup powdered sugar
Preheat the oven to 350°F (175°C) and grease or line an 8×8-inch baking pan with parchment paper.
Prepare the brownie batter: In a large mixing bowl, whisk together the melted butter and granulated sugar until smooth.
Add the eggs and vanilla extract, whisking until the mixture is well combined.
Gently fold in the flour, cocoa powder, baking powder, and salt until a smooth batter forms.
Bake the brownies: Pour the batter into the prepared pan and bake for 25–28 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
Allow the brownies to cool completely before adding the mousse layer.
Melt the chocolate: In a microwave-safe bowl or double boiler, melt the chocolate chips, stirring until smooth. Let the chocolate cool slightly.
Make the whipped cream: In a chilled bowl, beat the heavy whipping cream, vanilla extract, and powdered sugar until soft peaks form.
Prepare the mousse: Gently fold the melted chocolate into the whipped cream until smooth and fully combined.
Assemble the dessert: Spread the chocolate mousse evenly over the cooled brownies.
Chill the brownies in the refrigerator for at least 2 hours until the mousse is firm.
Slice into squares and serve chilled.
Chill the brownies longer for cleaner slices.
For extra flavor, sprinkle chocolate shavings or cocoa powder on top before serving.
Use high-quality chocolate chips for the best mousse texture and flavor.
Store leftovers in the refrigerator for up to 4 days.