Chocolate Mousse Cake

User Reviews

4.9

1,446 reviews
Excellent
  • Prep Time

    40 mins

  • Cook Time

    40 mins

  • Cool time

    45 mins

  • Total Time

    2 hrs 5 mins

  • Servings

    15

  • Calories

    583 kcal

  • Course

    Dessert

  • Cuisine

    American

Chocolate Mousse Cake

This Chocolate Mousse Cake recipe is moist, elegant, and so delicious! It's a simple, amazing chocolate cake filled with an easy dark chocolate mousse, and warm chocolate frosting poured on top!

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Ingredients

Servings

Chocolate Cake:

  • 2 cups granulated sugar
  • 1 3/4 cups + 2 Tbsp all-purpose flour
  • 3/4 cup unsweetened cocoa powder
  • 1 1/2 teaspoons baking powder
  • 1 1/2 teaspoons baking soda
  • 1 teaspoon salt
  • 2 large eggs
  • 1 cup buttermilk
  • 1/2 cup oil (vegetable or canola oil)
  • 2 teaspoons vanilla extract
  • 1 cup boiling water , or hot coffee

Chocolate Mousse:

  • 1/2 cup hot water
  • 4 Tablespoons unsweetened cocoa powder
  • 1 1/2 cups semi-sweet chocolate chips
  • 2 cups heavy whipping cream
  • 2 Tablespoons granulated sugar

Chocolate Frosting:

  • 6 Tablespoons milk
  • 3 Tablespoons unsweetened cocoa powder
  • 1/2 cup butter (one stick)
  • 3 3/4 cups powdered sugar
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Instructions

Chocolate Cake:

  1. Heat oven to 350°F. Grease and flour two 8 or 9 inch round baking pans. (I like to line the bottom of mine with wax or parchment paper).
  2. Stir together sugar, flour, cocoa powder, baking powder, baking soda and salt in large bowl.
  3. Add eggs, buttermilk, oil and vanilla; beat on medium speed of mixer 2 minutes.
  4. Stir in boiling water (the batter will be thin). Pour batter into prepared pans.
  5. Bake for about 30 to 35 minutes or until a toothpick inserted in the center comes out clean. 
  6. Allow cake to cool in the pan for 5 minutes and then remove to wire cooling racks. Cool completely. (You could freeze the cake rounds at this point, if desired.)

Chocolate Mousse:

  1. Stir the cocoa powder and hot water together.  In a double-boiler (or in the microwave) melt the chocolate chips, just until smooth.  Add the cocoa mixture to the melted chocolate chips and stir well to combine.  Allow to cool to room temperature.
  2. In a separate large bowl, beat the cream and sugar until very stiff peaks form.  Add the chocolate mixture and fold in with a spatula until well combined.  Refrigerate until ready to use, up to 5 days.

Chocolate frosting:

  1. In a medium saucepan, add milk, cocoa, and butter.  Bring to a boil.  Remove from heat.
  2. Add powdered sugar and mix with electric beaters to get rid of any lumps.  Allow to cool for 15-20 minutes, stirring occasionally. 

Assembly:

  1. Once cakes have cooled, use a sharp serrated knife to torte each cake (cut each cake evenly in half, horizontally, so that you end up with four, thin, 9'' cake pieces).
  2. Place your first cake layer on your cake serving plate. Spread a big spoonful of mousse on top of that cake layer. Repeat with the remaining cake layers, adding a layer of mousse filling between each layer of cake.
  3. Use remaining mousse filling to spread it evenly around the entire outside and top of the cake. Refrigerate for 30 minutes.
  4. (I usually make the warm chocolate frosting while the cake is in the fridge.)
  5. Remove cake from fridge and very slowly pour the cooled chocolate frosting over the top. Use a spatula or knife to gently spread the frosting evenly over the outside of the cake as you pour. 
  6. Refrigerate until ready to serve.
Equipments used:

Notes

  • Chocolate cake recipe is the Hershey's Chocolate cake. 
  • Make Ahead Instructions:
  • Mousse: Place in an airtight container in the fridge for up to 5 days. Fold it again gently with a spatula before using. But the texture is best the day of.
  • Cake Rounds: These can be made in advance and frozen. Once baked, cool them completely and then wrap them in a double layer of plastic wrap. Place in a freezer safe bag and freeze for up to 3 months.

Nutrition Information

Show Details
Calories 583kcal (29%) Carbohydrates 85g (28%) Protein 6g (12%) Fat 26g (40%) Saturated Fat 12g (60%) Polyunsaturated Fat 3g Monounsaturated Fat 10g Trans Fat 1g Cholesterol 56mg (19%) Sodium 357mg (15%) Potassium 345mg (10%) Fiber 4g (16%) Sugar 66g (132%) Vitamin A 370IU (7%) Vitamin C 1mg (1%) Calcium 106mg (11%) Iron 3mg (17%)

Nutrition Facts

Serving: 15Serving

Amount Per Serving

Calories 583 kcal

% Daily Value*

Calories 583kcal 29%
Carbohydrates 85g 28%
Protein 6g 12%
Fat 26g 40%
Saturated Fat 12g 60%
Polyunsaturated Fat 3g 18%
Monounsaturated Fat 10g 50%
Trans Fat 1g 50%
Cholesterol 56mg 19%
Sodium 357mg 15%
Potassium 345mg 7%
Fiber 4g 16%
Sugar 66g 132%
Vitamin A 370IU 7%
Vitamin C 1mg 1%
Calcium 106mg 11%
Iron 3mg 17%

* Percent Daily Values are based on a 2,000 calorie diet.

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