This deliciously rich Chocolate Mousse Cake recipe is everything a cake lover can ask for! The moist chocolate cake layers with a sweet generous mousse filling, it’s an elegant and beautiful cake yet so easy to make.

If you love baking cakes, try our Nutella Cake and classic Chocolate Spartak Recipe.

Chocolate mousse cake slice on a white plate with with a fork.

CHOCOLATE MOUSSE CAKE-

This gorgeous chocolate mousse cake is so simple to make and the flavor – absolutely delicious! The chocolate cake layers paired with the luscious homemade chocolate mousse cake filling come together so well. If you love chocolate, this cake recipe is for you!

Chocolate mousse cake on a white cake stand topped with fresh berries.

INGREDIENTS-

Cakes can be tedious to make, but don’t let the list of ingredients intimidate you! This dessert comes together so quickly!

Moist Chocolate Cake-

  • Flour– Be sure to use good quality all-purpose flour for this cake.
  • Baking Soda & Powder- To ensure that the cake rises and is fluffy, make sure to use fresh baking soda and powder.
  • Salt- We use salt to balance out the flavors.
  • Cocoa Powder- This cake calls for unsweetened cocoa powder, Hershey worlds great.
  • Sugar- Granulated sugar to sweeten this cake.
  • Oil- You can use vegetable oil or canola oil for this recipe.
  • Vanilla- Vanilla extract enhances the flavors in the cake.
  • Eggs- Eggs are what bind and keep the batter together.
  • Warm Coffee- Adding warm coffee to the batter is the key ingredient! The warm coffee brings out the chocolate flavor.
  • Sour Cream– We add sour cream to help moisten the batter.
  • Cake Soaking– For the cake soaking before frosting, we combine powdered sugar and milk.
A slice of chocolate mousse cake on a plate with a fork.

Chocolate Mousse Cake Filling-

  • Hot Water– Make sure the water is hot, not boiling but hot.
  • Cocoa Powder– Be sure to use natural unsweetened cocoa powder.
  • Chocolate Chips– You want to use semi-sweet chocolate chip morsels, chunks or melting disks. The chocolate needs to be melted, use your favorite method.
  • Heavy Whipping Cream– A good quality fresh heavy whipping cream gives the frosting light and airy texture.
  • Powdered Sugar– To sweeten the mousse filling we use powdered sugar.
  • Vanilla– Vanilla extract for extra flavors.
  • Cream Cheese– Room temperature cream cheese is used to give the mousse creaminess and keep it from becoming runny.
Step by step collage of how to make homemade chocolate cake.

HOW TO MAKE MOIST CHOCOLATE CAKE-

Alright, first we make the cake.

  1. Prep– Preheat the oven and line 4 (9-inch) round baking pans with parchment paper.
  2. Dry Ingredients– Sift together flour, cocoa powder, baking soda, powder and salt into a bowl; set aside.
  3. Wet Ingredients– In a large bowl, whisk together the sugar and eggs. Add in the oil, vanilla, warm coffee and sour cream and mix.
  4. Combine– Add the dry ingredients to the wet ingredients and whisk until well combined.
  5. Pour into Pans– Divide the batter into the 4 prepared baking pans. If you don’t have four pans, bake two at a time.
  6. Bake– Bake until baked and toothpick runs clean through cakes.
  7. Cool– Remove from oven and transfer from pans to cooling rack and allow the layers to completely cool.

MOUSSE CAKE FILLING-

Next, while the cake layers are cooling we prepare our mousse filling.

  1. Melt Chocolate– In a bowl, whisk together the hot water and cocoa powder. Add mixture to the melted chocolate and mix until combined. Set aside to cool completely.
  2. Cream Cheese– Use a stand mixer or handheld mixer, beat the cream cheese. Once creamy add the powdered sugar and vanilla and mix.
  3. Whip Heavy Cream– In a separate bowl, whisk the heavy whipping cream until thick and fluffy.
  4. Combine– Add the cooled melted chocolate mixture to the cream cheese mixture and mix.
  5. Combine All– Add the whipped cream and beat on high until the mouse becomes thick, fluffy and creamy.
Step by step collage of how to make homemade chocolate mousse frosting.

HOW TO ASSEMBLE CAKE-

Once the cake layers are cooled and the mousse filling is ready, you can now assemble the cake!

  1. Add the cake soaking mixture to a squeezable bottle.
  2. Spread some of the mousse filling onto the cake stand to keep layers from moving, add the first layer onto the cake stand.
  3. Soak the entire layer generously and top with mousse filling, add the next layer. Repeat with all four cake layers.
  4. Cover the sides and tops with the mousse filling and then decorate as desired.
  5. Refrigerate until ready to serve.
  6. Slice and enjoy!

Decor Ideas-

There are so many different ways to decorate your cake! Here are some of our favorite ideas:

  • Pipe leftover mouse filling into the desired design
  • Pour top with chocolate ganache
  • Top with fresh fruit
  • Top with chocolate shavings
  • Add coconut shavings or almonds
Step by step collage of how to assemble chocolate cake.

FREQUENTLY ASKED QUESTIONS-

What if I don’t have 4 cake pans?

If you do not have 4, you can bake the first two layers, then the next two.

Does my coffee need to be warm to add the cake batter?

Yes! The warm coffee allows the cocoa powder to “activate” or bloom.

Why didn’t my cake rise?

Your baking soda and powder may not be fresh.

Why is my chocolate cake hard?

The chocolate cake layers are more likely overbaked.

Do I need to make sure the melted chocolate mixture is cooled before adding to rest of the mousse ingredients?

Yes! If you add it in when it is still warm, the mousse will melt and become liquid and will not hold shape.

How to store chocolate mousse cake?

Store the cake in the fridge to avoid the mousse from melting. Store in the fridge, covered for up to 4-5 days.

Can I freeze the chocolate cake?

We do not recommend freezing this cake. You can freeze the chocolate cake layers though if you want to make them in advance. Once cake layers are cooled wrap in plastic wrap and add to a freezer-safe bag and freeze for up to 3 months. When ready to use, just defrost in the fridge and make the cake.

Can I make this ahead of time?

Yes! Create the mouse up to 3 days in advance and store in an airtight container in the fridge. Prepare the chocolate cake up to 2-3 days in advance. When ready just assemble and serve.

Can I add fruit in between layers?

Yes! You love adding raspberry puree or strawberry puree in between the layers, like our Chocolate Strawberry Cake.

Chocolate mousse cake on a cake stand with a slice being taken out.

OTHER cake RECIPES-

Rich Chocolate Mousse Cake

Print
5 from 2 votes
This deliciously rich Chocolate Mousse Cake recipe is everything a cake lover can ask for! The moist chocolate cake layers with a sweet generous mousse filling, it’s an elegant and beautiful cake yet so easy to make.
Prep Time: 30 minutes
Cook Time: 15 minutes
Total Time: 45 minutes
Servings: 12 servings

Ingredients

chocolate cake-

cake soaking-

chocolate mousse cake filling-

Instructions

How to make chocolate cake-

  • Preheat the oven to 350°F and line four 9-inch round baking pans with parchment paper, spray the sides with baking spray.
  • In a large bowl, sift together the flour, cocoa powder, baking soda, baking powder, and salt. Set aside.
  • In a separate bowl, whisk together sugar and eggs until combined.
  • Add in the oil, vanilla, warm coffee, and sour cream and mix until combined.
  • Combine the dry ingredients with the wet ingredients. Divide the cake batter evenly between the 4 prepared cake pans.
  • Bake for 15-17 minutes, until cooked and toothpick comes out clean.
  • Allow the cake layers to cool completely on a cooling rack.

How to make chocolate mousse frosting-

  • Combine the hot water and cocoa powder in bowl.
  • Add the chocolate chip morsels into a bowl and melt.
  • Once the chocolate chips are melted, add to the cocoa powder mixture and mix until well combined.
  • In a separate bowl, beat the cream cheese with a blender until creamy. Add the powdered sugar and vanilla and mix to combine.
  • Add the chocolate mixture to the cream cheese mixture and mix.
  • In a separate bowl, whisk the heavy whipping cream with a blender until fluffy and thick. Gently mix the heavy whipping cream with the chocolate cream cheese mixture on high until a fluffy chocolate mousse frosting is formed.

How to assemble the chocolate mousse cake-

  • Once the chocolate cake layers are cooled, place one layer onto the cake stand.
  • Add the cake soaking mixture to a squeezable bottle.
  • Squeeze some of the soaking mixture all over the chocolate cake then top with some mousse filling. Top with the second cake layer.
  • Repeat the process with all the layers and mousse frosting. Cover the sides and tops with the mousse filling and then decorate as desired.
  • Refrigerate until ready to serve. Slice and enjoy!

Nutrition

Calories: 551kcalCarbohydrates: 53gProtein: 8gFat: 36gSaturated Fat: 15gPolyunsaturated Fat: 5gMonounsaturated Fat: 13gTrans Fat: 1gCholesterol: 87mgSodium: 426mgPotassium: 275mgFiber: 4gSugar: 32gVitamin A: 813IUVitamin C: 1mgCalcium: 108mgIron: 2mg
(The nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.)