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Best Chocolate Mousse Cake

A rich, velvety chocolate mousse cake that transforms ordinary moments into celebrations, combining the depth of chocolate with a light, airy mousse.
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Prep Time 30 minutes
Cook Time 25 minutes
Total Time 55 minutes
Servings: 10 slices
Course: Dessert
Cuisine: French
Calories: 350
Ingredients Equipment Method Notes

Ingredients
  

Main
  • 1 cup all-purpose flour
  • 1/2 cup unsweetened cocoa powder
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1/2 cup unsalted butter softened
  • 1 cup granulated sugar
  • 3 large eggs
  • 1 teaspoon vanilla extract
  • 1/2 cup heavy cream
  • 8 ounces dark chocolate chopped
  • 2 tablespoons powdered sugar
  • 1 teaspoon instant coffee optional

Equipment

  • Two 9-inch round cake pans
  • Mixing bowls
  • Electric mixer or whisk
  • Rubber spatula
  • Double boiler or microwave-safe bowl
  • Cooling rack
  • Plastic wrap

Method
 

  1. Preheat the oven to 350°F (175°C).
  2. Grease two 9-inch round cake pans with butter and dust lightly with cocoa powder.
  3. In a bowl, whisk together flour, cocoa powder, baking powder, and salt.
  4. In a separate bowl, beat softened butter and granulated sugar until light and fluffy.
  5. Add eggs one at a time, then mix in vanilla extract.
  6. Gradually add dry ingredients to wet mixture, mixing until just combined.
  7. Divide batter evenly between prepared pans and smooth tops.
  8. Bake for 25 minutes or until a toothpick inserted in the center comes out clean.
  9. Allow cakes to cool in pans for 10 minutes before transferring to a cooling rack.
  10. Melt the dark chocolate with heavy cream over a double boiler until smooth.
  11. Let chocolate mixture cool slightly, then whip with powdered sugar and optional instant coffee until fluffy.
  12. Once cakes are completely cool, place one layer on a serving plate and spread mousse on top.
  13. Add the second layer and frost the top with remaining mousse.

Notes

Chill the cake for a few hours before serving for extra flavor. Garnish with chocolate shavings or berries if desired.