Dark Chocolate Mousse Cake (Printable version)
Layers of moist chocolate sponge and velvety dark chocolate mousse topped with glossy chocolate glaze for an elegant showstopping dessert.
# What you need:
→ Chocolate Sponge
01 - 3 large eggs, room temperature
02 - 3.5 oz granulated sugar
03 - 2.8 oz all-purpose flour
04 - 0.7 oz unsweetened cocoa powder
05 - 0.5 tsp baking powder
06 - 0.25 tsp salt
07 - 2 tbsp whole milk
08 - 2 tbsp vegetable oil
09 - 1 tsp vanilla extract
→ Dark Chocolate Mousse
10 - 8.8 oz high-quality dark chocolate (60–70%), chopped
11 - 1.7 cups heavy cream, cold
12 - 3 large egg yolks, room temperature
13 - 2 oz granulated sugar
14 - 2 tbsp water
15 - 0.5 tsp vanilla extract
16 - Pinch of salt
→ Chocolate Glaze
17 - 4.2 oz dark chocolate, chopped
18 - 0.33 cup heavy cream
19 - 1 tbsp unsalted butter
# How To:
01 - Preheat oven to 350°F. Grease and line the base of a 9-inch springform pan with parchment paper.
02 - Sift together flour, cocoa powder, baking powder, and salt in a bowl.
03 - Beat eggs and sugar with an electric mixer until pale and tripled in volume, approximately 5 minutes.
04 - Gently fold in the dry ingredients. Drizzle in milk, oil, and vanilla extract; mix gently until just combined.
05 - Pour batter into the prepared pan and bake for 18–20 minutes until a toothpick inserted in the center comes out clean. Cool completely in the pan.
06 - Melt chocolate in a heatproof bowl over simmering water, stirring until smooth. Cool slightly.
07 - Combine sugar and water in a small saucepan. Heat until sugar dissolves and mixture comes to a simmer.
08 - Beat egg yolks in a separate bowl. Gradually pour hot syrup into yolks while whisking constantly until pale and thick.
09 - Stir melted chocolate and vanilla extract into the egg yolk mixture. Add a pinch of salt.
10 - Whip cold cream in a clean bowl until soft peaks form.
11 - Fold one-third of whipped cream into the chocolate mixture to lighten, then gently fold in the remainder until smooth.
12 - Remove cooled sponge from pan and place on a serving platter. Clean and reassemble the pan ring around the sponge.
13 - Pour mousse over the sponge, smoothing the top. Refrigerate for at least 4 hours until set.
14 - Heat cream until just simmering, then pour over chopped chocolate and butter. Let sit 1 minute, then stir until glossy and smooth. Cool for 10 minutes.
15 - Remove cake from pan. Pour glaze over the mousse layer, allowing it to drip down the sides. Smooth with a spatula and chill for 30 minutes to set.
# Expert Advice:
01 -
- The mousse layer is impossibly smooth, the kind of texture that makes people pause and close their eyes for a second
- It looks like something from a French patisserie window but comes together with patience rather than professional training
- The chocolate intensity builds through three distinct layers, each one deeper than the last
02 -
- The sponge must be completely cool before adding the mousse, or the texture will turn dense and grainy
- Room temperature ingredients incorporate better, so do not skip the step of setting everything out ahead
03 -
- Brush the cooled sponge with a little coffee syrup before adding the mousse for an even more sophisticated flavor profile
- If your kitchen is warm, chill your mixing bowl and beaters before whipping the cream for faster, more stable results