Rich Chocolate Berry Mousse Cake Recipe

Moist Rich Chocolate Three Layer Berry Mousse Cake decorated with fresh fruits.

5 from 8 votes

Rich Chocolate Berry Mousse Cake Recipe

This rich chocolate berry mousse cake combines soft sponge, creamy mousse, and fruity filling. Perfect for any occasion!

Prep Time45

Cook Time30

Chilling3

Total Time4 15

Course: Desserts

Cuisine: European

Servings:

Calories: 609kcal

Author: Claudia Ciorteanu

Equipment

Mixing Bowls
8-inch cake pans
Spatula
Saucepan
Whisk

Ingredients

Sponge Cake

1 cup golden caster sugar or ¾ cup for a less sweet option
1 cup unsalted butter softened (plus extra for greasing pans)
4 large eggs
1 cup self-rising flour
2 tablespoons cocoa powder
1 teaspoon baking powder
½ teaspoon vanilla extract

Chocolate Mousse

10.5 oz milk chocolate 70% cocoa recommended
1 ¼ cups heavy cream
6 large eggs
3 tablespoons golden caster sugar

Mixed Berry Filling

35 oz frozen mixed berries
½ cup granulated sugar
4 tablespoons cornstarch
2 teaspoons lemon juice

Syrup

1 cup water
2 tablespoons caster sugar
½ lemon peel
½ orange peel
1 teaspoon vanilla extract

US Customary - Metric

Instructions

Make the Sponge Cake: Preheat your oven to 375°F (190°C). Grease three 8-inch round cake pans with butter or nonstick spray. Line the bottoms with parchment paper for easy removal. If you’re using one larger pan, make sure to line and grease it well, as the cake will be sliced into layers later.
In a large bowl, beat 1 cup softened butter and 1 cup sugar together using an electric mixer on medium-high speed until pale, light, and fluffy—about 3-4 minutes.
Add 4 eggs, one at a time, beating well after each addition. Scrape down the sides of the bowl with a spatula to ensure everything is well combined.
Sift together 1 ½ cups all-purpose flour, ⅓ cup cocoa powder, and 2 teaspoons baking powder into the wet mixture. Stir gently with a spatula until just combined—avoid overmixing. Add 1 teaspoon vanilla extract and stir briefly until smooth.
Divide the batter evenly among the prepared pans, smoothing the tops with a spatula. Bake for 18-20 minutes, or until a skewer inserted in the center comes out clean. The cakes should spring back lightly when touched.
Let the cakes cool in the pans for 5-10 minutes, then carefully turn them out onto a wire rack. Remove the parchment paper and let them cool completely before assembling.
Make the Chocolate Mousse: Place 8 ounces (225g) of chopped dark chocolate in a heatproof bowl. Set it over a pot of simmering water, ensuring the bowl doesn’t touch the water. Stir until smooth and glossy. Remove from heat and let it cool for 10 minutes.
In a separate bowl, whip 1 ¼ cups heavy cream with a hand mixer until soft peaks form. Be careful not to overwhip—it should hold its shape but still be soft and smooth. Set aside.
Separate 3 eggs into yolks and whites. In one bowl, whisk the yolks with 2 tablespoons sugar until pale and creamy. In another clean bowl, beat the egg whites with a pinch of salt until stiff peaks form (it should look glossy).
Fold the melted chocolate into the yolk mixture, mixing until just combined. Add the whipped cream in 2-3 additions, folding gently with a spatula to keep the mixture light. Finally, fold in the beaten egg whites until fully incorporated. Be very gentle to maintain the mousse’s airy texture. Set aside in the refrigerator until ready to use.
In a medium saucepan, combine 2 cups mixed berries (fresh or frozen), ¼ cup sugar, and 1 tablespoon lemon juice. Cook over medium heat, stirring occasionally, until the berries soften and start releasing their juices—about 8 minutes.
In a small bowl, dissolve 1 tablespoon cornstarch in 2 tablespoons water. Stir the slurry into the berries, cooking for another 1-2 minutes, or until the mixture thickens and coats the back of a spoon. Remove the saucepan from heat and let the filling cool completely before using.
Make the Syrup: In a small saucepan, combine ½ cup water, ¼ cup sugar, and 1 tablespoon rum or vanilla extract (optional). Simmer over low heat for 5 minutes, stirring until the sugar dissolves. Remove from heat and allow the syrup to cool completely.
Assemble the Cake: Place the first sponge cake layer on a cake stand or serving plate. Brush generously with the syrup to keep the cake moist.
Spread a third of the chocolate mousse evenly over the cake layer, followed by half of the berry filling. Use a spatula to smooth it out.
Place the second cake layer on top and brush it with more syrup. Spread another third of the mousse and the remaining berry filling.
Add the final sponge layer, brushing it again with syrup. Spread the remaining chocolate mousse on top and around the sides if desired. Place the assembled cake in the refrigerator for at least 3 hours (or overnight) to allow the layers to set.
Decorate: Right before serving, decorate the top of the cake with fresh berries (like strawberries, raspberries, or blueberries), fresh figs, redcurrants and chocolate shavings. If you want, dust with a bit of powdered sugar for a finishing touch. Enjoy!

Notes

Room-Temperature Ingredients: For the sponge cake and mousse, make sure the butter, eggs, and cream are at room temperature. This helps the batter mix evenly and the mousse achieves a smooth, airy texture.
Egg Safety: The chocolate mousse contains raw eggs. For safety, use pasteurized eggs if serving to children, pregnant individuals, or anyone with a compromised immune system.
Cake Layers: If you only have one cake pan, bake the layers one at a time, but don’t let the batter sit for too long. Alternatively, bake in a single pan and slice into layers once cooled.
Berry Filling: Feel free to swap out the mixed berries with a single fruit, like raspberries or strawberries, depending on what you have on hand. Frozen berries work perfectly here too—no need to thaw them first.
Mousse Texture: Be gentle when folding the ingredients together for the mousse. Overmixing can deflate the airy texture, making it dense.
Storage: Store the cake in the fridge, covered, for up to 3 days. Let it sit at room temperature for 10-15 minutes before serving to soften slightly.
Make Ahead: You can prepare the sponge cake, syrup, and berry filling a day in advance to save time. Assemble the cake on the day you plan to serve it.

Nutrition