Print

Dark Chocolate Mousse Cake: A Rich, Creamy, and Decadent Chocolate Dessert

Print Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

No reviews

A decadent dark chocolate mousse cake featuring a moist chocolate cake base, a thick layer of silky dark chocolate mousse, and a rich chocolate ganache topping. An elegant, indulgent dessert perfect for celebrations and chocolate lovers.

Ingredients

  • Chocolate Cake:
  • 1 cup (125 g) all-purpose flour
  • 1 cup (200 g) granulated sugar
  • 6 tablespoons (32 g) unsweetened natural cocoa powder
  • 3/4 teaspoon baking soda
  • 1/2 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1/2 cup (120 ml) vegetable oil
  • 1 large egg, at room temperature
  • 1/2 cup (120 ml) buttermilk, at room temperature
  • 1 teaspoon pure vanilla extract
  • 1/2 cup (120 ml) hot coffee or hot water
  • Dark Chocolate Mousse:
  • 8 ounces (226 g) semi-sweet or bittersweet chocolate, finely chopped
  • 2 cups (480 ml) cold heavy whipping cream, divided
  • 1/4 cup (30 g) confectioners’ sugar
  • 1 teaspoon pure vanilla extract
  • Chocolate Ganache:
  • 4 ounces (113 g) semi-sweet chocolate, finely chopped
  • 1/2 cup (120 ml) heavy cream
  • Optional: chocolate shavings or fresh berries for decoration

Instructions

  1. Prepare the oven and pan: Preheat the oven to 350°F (177°C). Grease a 9-inch springform pan and line the bottom with parchment paper.
  2. Mix the dry ingredients: In a large mixing bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt.
  3. Combine the wet ingredients: Add the vegetable oil, egg, buttermilk, and vanilla extract. Mix until combined. Slowly pour in the hot coffee or water and stir until the batter is smooth and thin.
  4. Bake the cake: Pour the batter into the prepared pan. Bake for approximately 25–30 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs.
  5. Cool completely: Allow the cake to cool in the pan before adding the mousse. The cake must be completely cool to prevent the mousse from melting.
  6. Melt the chocolate: Place the chopped dark chocolate in a heatproof bowl. Heat 1/2 cup of the heavy cream until steaming, then pour it over the chocolate. Let stand for 2–3 minutes and stir until smooth. Allow the mixture to cool to room temperature while remaining fluid.
  7. Whip the cream: In a chilled mixing bowl, beat the remaining 1 1/2 cups cold heavy cream with the confectioners’ sugar and vanilla extract until medium-stiff peaks form.
  8. Prepare the mousse: Gently fold a portion of the whipped cream into the cooled chocolate mixture to lighten it. Fold in the remaining whipped cream in batches until evenly combined, taking care not to deflate the mousse.
  9. Assemble the cake: Keep the cooled cake inside the springform pan. Spread the chocolate mousse evenly over the cake base and smooth the surface with an offset spatula.
  10. Chill: Refrigerate the assembled cake for at least 4–6 hours, preferably overnight, until the mousse is firm and fully set.
  11. Prepare the ganache: Place the chopped chocolate in a heatproof bowl. Heat the heavy cream until steaming and pour it over the chocolate. Let stand for 2–3 minutes, then stir gently until glossy and smooth. Allow to cool slightly.
  12. Finish the cake: Carefully release the springform pan and transfer the chilled cake to a serving plate. Pour the slightly cooled ganache over the mousse, spreading gently across the top.
  13. Serve: Refrigerate briefly until the ganache sets. Decorate with chocolate shavings or berries, slice with a warm clean knife, and serve chilled.

Notes

  • This is an adapted recipe inspired by Sally’s Baking Addiction Dark Chocolate Mousse Cake, not a verified transcription of the original recipe.
  • Use high-quality semi-sweet or bittersweet chocolate for a rich chocolate flavor and smooth mousse texture.
  • For a more intense chocolate flavor, use hot brewed coffee in the cake batter. The coffee enhances the chocolate without making the cake taste strongly of coffee.
  • Make sure the chocolate mixture has cooled before folding in the whipped cream to prevent the mousse from collapsing.
  • Do not overwhip the cream, as this can create a grainy mousse texture.
  • Chilling overnight produces cleaner slices and allows the mousse to set thoroughly.
  • For neat slices, dip a sharp knife into hot water and wipe it dry between cuts.
  • Store the cake covered in the refrigerator for up to 4 days.
  • Serve with fresh raspberries, strawberries, or additional chocolate shavings.
  • Nutrition information is estimated and will vary depending on the chocolate and cream used.

Nutrition

Find it online: https://yumfamilyrecipes.com/dark-chocolate-mousse-cake-a-rich-creamy-and-decadent-chocolate-dessert/