The Best Chocolate Mousse Cake for Serious Dessert Lovers

Chocolate Mousse Cake 🎂

If you love chocolate in all its forms—light, fluffy, dense, and rich—then this Chocolate Mousse Cake will send you straight to dessert heaven. With a base of moist chocolate cake and a luscious, airy mousse topping, this cake is both elegant and indulgent. It’s perfect for birthdays, holidays, or whenever you need a showstopping dessert to impress.


🌟 Why I Love This Recipe

This recipe hits all the best textures:
✅ Moist and tender chocolate cake base
✅ Light, creamy, melt-in-your-mouth mousse
✅ Finished with whipped cream and chocolate shavings

It’s decadent but balanced, rich without being overly heavy, and surprisingly simple to assemble with no special equipment required—just bowls, whisks, and a little love.


🛒 Ingredients

For the Chocolate Cake:

  • 1 cup all-purpose flour
  • ½ cup unsweetened cocoa powder
  • 1 tsp baking powder
  • ½ tsp baking soda
  • ¼ tsp salt
  • ½ cup unsalted butter, softened
  • 1 cup granulated sugar
  • large eggs
  • 1 tsp vanilla extract
  • ½ cup buttermilk

For the Chocolate Mousse:

  • 8 oz semi-sweet chocolate, chopped
  • 2 tbsp unsalted butter
  • large eggs, separated
  • ¼ cup granulated sugar
  • 1 cup heavy cream
  • 1 tsp vanilla extract

For the Topping:

  • Whipped cream, for garnish
  • Chocolate shavings, for garnish

⏱️ Total Time: ~1 hour + chilling
🍰 Yield: 8–10 slices


👩‍🍳 Instructions

STEP 1: Make the Cake

  1. Preheat Oven
    Preheat to 350°F (175°C). Grease and flour an 8-inch round cake pan.
  2. Mix Dry Ingredients
    In a bowl, whisk together:
    • Flour
    • Cocoa powder
    • Baking powder
    • Baking soda
    • Salt
  3. Cream Butter and Sugar
    In a large bowl, cream butter and sugar until light and fluffy.
  4. Add Eggs and Vanilla
    Beat in the eggs one at a time, then add vanilla extract.
  5. Combine Mixtures
    Add the dry mixture to the wet ingredients in batches, alternating with buttermilk. Mix until just combined.
  6. Bake
    Pour batter into prepared pan and bake for 25–30 minutes, or until a toothpick comes out clean.
    Let the cake cool completely in the pan.

STEP 2: Make the Mousse

  1. Melt Chocolate
    In a heatproof bowl, melt:
    • Chocolate
    • Butter
    Do this over a pot of simmering water (double boiler), stirring until smooth.
    Let cool slightly.
  2. Whip Egg Whites
    In a clean bowl, beat egg whites until soft peaks form.
    Gradually add sugar and beat until stiff peaks form.
  3. Mix Yolks and Chocolate
    Stir egg yolks into the cooled chocolate mixture.
  4. Fold in Egg Whites
    Gently fold in the whipped egg whites until no white streaks remain.
  5. Whip Cream
    In a separate bowl, whip heavy cream with vanilla extract until soft peaks form.
  6. Fold Cream into Chocolate Mixture
    Carefully fold the whipped cream into the chocolate base. The result should be smooth and airy.

STEP 3: Assemble the Cake

  1. Remove Cake from Pan
    Place the cooled cake on a serving platter or cake stand.
  2. Add Mousse Layer
    Spread the mousse evenly over the top of the cake.
    Smooth the surface with a spatula.
  3. Chill
    Refrigerate the cake for at least 2–3 hours (or overnight) until the mousse is fully set.
  4. Decorate
    Before serving, top with whipped cream swirls and a sprinkle of chocolate shavings.

💡 Tips for Mousse Cake Success

  • Separate eggs carefully—any yolk in the whites can prevent stiff peaks.
  • Don’t rush the cooling and chilling steps—they’re key for mousse texture.
  • Use a springform pan if you want perfect sides and easy release.
  • For extra chocolate intensity, add a teaspoon of espresso powder to the cake batter.

🍽️ Serving Suggestions

Serve chilled with:

  • A glass of cold milk
  • A mug of espresso or mocha
  • Or alongside Peanut Butter Brownies for a truly indulgent dessert plate

Pair with:


🧊 Storage & Make-Ahead Tips

  • Store in the fridge, covered, for up to 4 days.
  • For clean slices, run a knife under hot water and wipe between cuts.
  • Freeze slices individually (without whipped cream) for up to 1 month.

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🍫 Final Thoughts

This Chocolate Mousse Cake is everything a chocolate dessert should be—moist, rich, airy, and unforgettable. The balance of textures and deep chocolate flavor makes this cake a showstopper for any special occasion or just a well-deserved treat for yourself.

If you make it, tag @chefmaniac on Instagram—we’d love to see your delicious creation! And don’t forget to subscribe for more decadent bakes and elegant dessert inspiration.