Description

A decadent three-layer chocolate mousse cake featuring a rich chocolate cake base, a velvety dark chocolate mousse middle, and a light and airy white chocolate mousse top — perfect for any celebration.

Ingredients

Units Scale

1 cup all-purpose flour
1/2 cup unsweetened cocoa powder
1 tsp baking powder
1/2 tsp baking soda
1/4 tsp salt
3/4 cup granulated sugar
1/2 cup brown sugar
2 large eggs
1/2 cup buttermilk
1/2 cup vegetable oil
1 tsp vanilla extract
1/2 cup hot water
8 oz dark chocolate, chopped
1 1/2 cups heavy cream (for dark chocolate mousse)
1 packet (2 1/4 tsp) unflavored gelatin
3 tbsp cold water
8 oz white chocolate, chopped
1 1/2 cups heavy cream (for white chocolate mousse)
Chocolate shavings or cocoa powder (for garnish)

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Instructions

Preheat the oven to 350°F (175°C). Grease and line a 9-inch round cake pan.
In a bowl, whisk together flour, cocoa powder, baking powder, baking soda, and salt.
In another bowl, beat together granulated sugar, brown sugar, eggs, buttermilk, oil, and vanilla extract until well combined.
Gradually mix the dry ingredients into the wet mixture. Stir in the hot water until smooth.
Pour the batter into the prepared pan and bake for 25–30 minutes or until a toothpick comes out clean. Let the cake cool completely.
For the dark chocolate mousse: Sprinkle gelatin over cold water and let sit for 5 minutes. Melt dark chocolate and allow to cool slightly. Heat 1/2 cup cream until just warm, dissolve the gelatin in it, then stir into melted chocolate. Whip remaining 1 cup cream to soft peaks and fold into the chocolate mixture. Spread over the cooled cake base and refrigerate until set.
For the white chocolate mousse: Repeat the process with white chocolate and cream. Spread over the set dark chocolate mousse layer and refrigerate at least 4 hours or overnight.
Before serving, garnish with chocolate shavings or dust with cocoa powder. Slice and enjoy!

Notes

Make sure each mousse layer is fully set before adding the next.
You can substitute the base cake with store-bought chocolate sponge for convenience.
Use high-quality chocolate for the best flavor.
Chill the mixing bowl before whipping cream for best results.

Nutrition

Serving Size: 1 slice
Calories: 450
Sugar: 30g
Sodium: 120mg
Fat: 32g
Saturated Fat: 18g
Unsaturated Fat: 12g
Trans Fat: 0g
Carbohydrates: 38g
Fiber: 2g
Protein: 5g
Cholesterol: 85mg