Chocolate Mousse Brownie Cake is an indulgent dessert that layers rich, fudgy brownies with a light and airy chocolate mousse. This decadent treat is perfect for chocolate lovers and makes a stunning centerpiece for any celebration.
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Ingredients
For the Brownie Layer:
- 1 cup unsalted butter (2 sticks)
- 2 cups granulated sugar
- 4 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1 cup unsweetened cocoa powder
- 1/2 teaspoon salt
- 1/2 teaspoon baking powder
For the Chocolate Mousse:
- 8 oz semi-sweet chocolate (chopped)
- 2 tablespoons unsalted butter
- 3 large eggs (separated)
- 1/4 cup granulated sugar
- 1 cup heavy cream
- 1 teaspoon vanilla extract
Timing
Making Chocolate Mousse Brownie Cake takes about 30 minutes for preparation and 30-35 minutes for baking, plus chilling time for the mousse.
Instructions
Step 1: Prepare the Brownie Layer
- Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan and line it with parchment paper for easy removal.
- Melt Butter and Sugar: In a medium saucepan over low heat, melt the butter and granulated sugar together, stirring until smooth. Remove from heat and let cool slightly.
- Add Eggs and Vanilla: Stir in the eggs, one at a time, followed by the vanilla extract.
- Mix Dry Ingredients: In a separate bowl, sift together the flour, cocoa powder, salt, and baking powder.
- Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
- Bake: Pour the brownie batter into the prepared pan and spread it evenly. Bake for 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Let the brownies cool completely in the pan.
Step 2: Prepare the Chocolate Mousse
- Melt Chocolate: In a heatproof bowl, combine the chopped chocolate and butter. Melt over a double boiler or in the microwave, stirring until smooth. Let cool slightly.
- Whip Egg Yolks: In a separate bowl, whisk the egg yolks with the granulated sugar until pale and thick. Stir in the melted chocolate mixture and vanilla extract.
- Whip Egg Whites: In another bowl, beat the egg whites until stiff peaks form. Gently fold the whipped egg whites into the chocolate mixture.
- Whip Cream: In a separate bowl, whip the heavy cream until soft peaks form. Gently fold the whipped cream into the chocolate mixture until fully incorporated.
Step 3: Assemble the Cake
- Layer Mousse on Brownies: Once the brownies are completely cooled, pour the chocolate mousse over the brownie layer, spreading it evenly.
- Chill: Refrigerate the assembled cake for at least 4 hours, or until the mousse is set.
Step 4: Serve
- Slice and Serve: Once set, remove the cake from the refrigerator. Use the parchment paper to lift it out of the pan and cut into squares.
- Garnish: Optionally, garnish with chocolate shavings or fresh berries before serving.
- Enjoy: Serve chilled and enjoy this rich and decadent dessert!

Nutritional Information
Here’s a quick overview of the nutritional content of Chocolate Mousse Brownie Cake (per serving, based on 12 servings):
| Nutrient | Amount per Serving |
|---|---|
| Calories | 350 |
| Protein | 5g |
| Fat | 24g |
| Carbohydrates | 30g |
| Fiber | 2g |
| Sugar | 18g |
Tips for Customization
- Add Nuts: Incorporate chopped nuts like walnuts or pecans into the brownie batter for added texture.
- Flavor Variations: Add a splash of coffee or espresso to the chocolate mousse for a mocha flavor.
- Different Chocolates: Experiment with dark chocolate or white chocolate for the mousse for different flavors.
Conclusion
Chocolate Mousse Brownie Cake is a rich and indulgent dessert that perfectly combines the fudgy texture of brownies with the lightness of chocolate mousse. This show-stopping treat is sure to impress at any gathering and satisfy even the most serious chocolate cravings. Enjoy this delightful recipe!
Chocolate Mousse Brownie Cake Recipe
Ingredients
- For the Brownie Layer:
- • 1 cup unsalted butter (2 sticks)
- • 2 cups granulated sugar
- • 4 large eggs
- • 1 teaspoon vanilla extract
- • 1 cup all-purpose flour
- • 1 cup unsweetened cocoa powder
- • 1/2 teaspoon salt
- • 1/2 teaspoon baking powder
- For the Chocolate Mousse:
- • 8 oz semi-sweet chocolate (chopped)
- • 2 tablespoons unsalted butter
- • 3 large eggs (separated)
- • 1/4 cup granulated sugar
- • 1 cup heavy cream
- • 1 teaspoon vanilla extract
Instructions
- Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking pan and line it with parchment paper for easy removal.
- Melt Butter and Sugar: In a medium saucepan over low heat, melt the butter and granulated sugar together, stirring until smooth. Remove from heat and let cool slightly.
- Add Eggs and Vanilla: Stir in the eggs, one at a time, followed by the vanilla extract.
- Mix Dry Ingredients: In a separate bowl, sift together the flour, cocoa powder, salt, and baking powder.
- Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
- Bake: Pour the brownie batter into the prepared pan and spread it evenly. Bake for 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Let the brownies cool completely in the pan.
- Melt Chocolate: In a heatproof bowl, combine the chopped chocolate and butter. Melt over a double boiler or in the microwave, stirring until smooth. Let cool slightly.
- Whip Egg Yolks: In a separate bowl, whisk the egg yolks with the granulated sugar until pale and thick. Stir in the melted chocolate mixture and vanilla extract.
- Whip Egg Whites: In another bowl, beat the egg whites until stiff peaks form. Gently fold the whipped egg whites into the chocolate mixture.
- Whip Cream: In a separate bowl, whip the heavy cream until soft peaks form. Gently fold the whipped cream into the chocolate mixture until fully incorporated.
- Layer Mousse on Brownies: Once the brownies are completely cooled, pour the chocolate mousse over the brownie layer, spreading it evenly.
- Chill: Refrigerate the assembled cake for at least 4 hours, or until the mousse is set.
- Slice and Serve: Once set, remove the cake from the refrigerator. Use the parchment paper to lift it out of the pan and cut into squares.
- Garnish: Optionally, garnish with chocolate shavings or fresh berries before serving.
- Enjoy: Serve chilled and enjoy this rich and decadent dessert!
Step 1: Prepare the Brownie Layer
Step 2: Prepare the Chocolate Mousse
Step 3: Assemble the Cake
Step 4: Serve
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