Servings
Font
Back
0 from 492 votes

Chocolate Mousse Cake

Moist dark chocolate cake that's topped with an easy chocolate mousse.

Prep Time
50 mins
Cook Time
50 mins
Total Time
1 hr 20 mins
Servings: 20 servings
Calories: 449 kcal
Course: Dessert
Cuisine: American

Ingredients

Chocolate Cake
  • 1 ¾ cups all-purpose flour
  • 1 ¾ cups granulated sugar
  • 3/4 cups unsweetened cocoa powder
  • 2 teaspoons baking soda
  • 1 teaspoon baking powder
  • 1 teaspoon kosher salt
  • 1 cup buttermilk
  • 1/2 cup vegetable oil
  • 2 large eggs
  • 2 teaspoons vanilla extract
  • 1 cup hot water not boiling
Chocolate Mousse
  • 1 ½ cups mini marshmallows
  • 8 ounces semisweet baking chocolate chopped
  • 1/2 cup milk
  • 2 cups cold heavy whipping cream
  • 1/2 teaspoon vanilla extract

Instructions

Chocolate Cake
    Cup of Yum
  1. Preheat oven to 350 F. Grease a 9x13-inch baking pan. Set aside.
  2. In a medium bowl, whisk together flour, sugar, cocoa powder, baking soda, baking powder, and salt. Set aside.
  3. In a large bowl, whisk together buttermilk and vegetable oil.
  4. Whisk in eggs one at a time.
  5. Stir in dry ingredients until just combined.
  6. Add hot water and vanilla.
  7. Whisk until just combined.
  8. Pour batter into prepared baking dish.
  9. Bake 30-40 minutes, or until wooden toothpick inserted in the center comes out clean.
  10. Cool to room temperature.
Chocolate Mousse
  1. To make the chocolate mousse, add mini marshmallows, chocolate, and milk to a large, heavy saucepan.
  2. Cook over low heat, stirring constantly, until melted and well-combined.
  3. Remove from heat, and cool completely.
  4. In a large bowl, beat whipping cream and vanilla together to soft peak stage.
  5. Fold whipped cream into cooled chocolate mixture.
  6. Spread over cooled cake.
  7. Chill for at least 30 minutes, or until ready to serve.
  8. Refrigerate any leftovers.

Notes

  • Cocoa powder: I use regular unsweetened cocoa powder in this recipe. I've also used Hershey's special dark cocoa powder. However, I haven't tried Dutch-processed cocoa powder with this cake.
  • Salt: If you don't have kosher salt, use 1/2 teaspoon table salt instead.
  • Buttermilk: Regular or low-fat will work. If you don't have buttermilk, you can make a quick substitute with this recipe.
  • Water: I use hot tap water about (150F).
  • Semisweet baking chocolate: If you'd like a sweeter mousse, you can use milk baking chocolate.
  • Milk: Any milk from skim to whole milk will work.
  • Nutrition facts are estimates.

Nutrition Information

Serving 1serving Calories 449kcal (22%) Carbohydrates 63g (21%) Protein 6g (12%) Fat 21g (32%) Saturated Fat 13g (65%) Cholesterol 51mg (17%) Sodium 279mg (12%) Potassium 294mg (8%) Fiber 4g (16%) Sugar 36g (72%) Vitamin A 405IU (8%) Vitamin C 0.2mg (0%) Calcium 71mg (7%) Iron 3.1mg (17%)

Nutrition Facts

Serving: 20servings

Amount Per Serving

Calories 449

% Daily Value*

Serving 1serving
Calories 449kcal 22%
Carbohydrates 63g 21%
Protein 6g 12%
Fat 21g 32%
Saturated Fat 13g 65%
Cholesterol 51mg 17%
Sodium 279mg 12%
Potassium 294mg 6%
Fiber 4g 16%
Sugar 36g 72%
Vitamin A 405IU 8%
Vitamin C 0.2mg 0%
Calcium 71mg 7%
Iron 3.1mg 17%

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