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–+ servings
Slice of chocolate chocolate mousse cake on a plate.
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Chocolate Chocolate Mousse Cake

This Chocolate Chocolate Mousse Cake is a layer of tender and rich chocolate cake, that is topped with a sweet and fluffy chocolate mousse. It's great for chocolate lovers.
Prep Time30 minutes
Cook Time25 minutes
Chill Time2 hours
Total Time2 hours 55 minutes
Course: Dessert
Cuisine: American
Servings: 12 Servings
Calories: 353kcal
Author: Wendy

Equipment

  • 9x13 baking dish
  • Large bowl
  • microwave-safe bowl
  • Large bowl
  • Electric Mixer

Ingredients

For the Cake:

  • 1 ½ cups all-purpose flour
  • 1 cup granulated sugar
  • ½ cup cocoa powder
  • 1 teaspoon baking powder
  • ½ teaspoon baking soda
  • ½ teaspoon salt
  • 2 large eggs
  • 1 cup milk
  • ½ cup vegetable oil
  • 2 teaspoons vanilla extract
  • 1 cup boiling water

For the Chocolate Mousse:

  • 1 ½ cups heavy cream chilled
  • 1 cup semi-sweet chocolate chips
  • ¼ cup powdered sugar
  • 1 teaspoon vanilla extract

Instructions

  • Preheat your oven to 350°F (175°C). Grease and flour in a 9x13 baking pan.
  • In a large bowl, whisk together the flour, sugar, cocoa powder, baking powder, baking soda, and salt.
  • Add the eggs, milk, oil, and vanilla extract to the dry ingredients. Mix until smooth.
  • Stir in the boiling water until the batter is well combined. It will be thin.
  • Pour the batter into the prepared pan and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
  • Let the cake cool completely in the pan.
  • While the cake is cooling, melt the chocolate chips in a microwave-safe bowl in 30-second intervals, stirring between each until smooth. Let it cool slightly.
  • In a large mixing bowl, whip the chilled heavy cream with powdered sugar and vanilla extract until soft peaks form.
  • Gently fold the melted chocolate into the whipped cream until fully incorporated and smooth.
  • Once the cake is completely cool, spread the chocolate mousse evenly over the top of the cake.
  • Chill the cake in the refrigerator for at least 2 hours to set the mousse.
  • Cut into squares and serve chilled.

Notes

Any nutritional data I provide is an approximation and actual dietary information can vary based on ingredients and proportion sizes.

Nutrition

Serving: 1Slice | Calories: 353kcal | Carbohydrates: 43g | Protein: 6g | Fat: 19g | Saturated Fat: 11g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Trans Fat: 0.01g | Cholesterol: 64mg | Sodium: 208mg | Potassium: 227mg | Fiber: 3g | Sugar: 27g | Vitamin A: 517IU | Vitamin C: 0.2mg | Calcium: 86mg | Iron: 2mg