Chocolate Mousse Layer Cake
If you’re looking for a show-stopping dessert that’s both elegant and indulgent, you’ve come to the right place! This Chocolate Mousse Layer Cake is a delightful treat that layers moist chocolate cake with rich dark and white chocolate mousses, topped off with a silky milk chocolate ganache. It’s my go-to dessert for birthdays, family gatherings, or simply when I want to impress friends over coffee.
What makes this cake truly special is how it combines different textures and flavors, creating an experience that feels luxurious with every bite. Plus, it’s surprisingly straightforward to make—perfect for anyone who wants to bring a little sweetness into their lives without too much fuss!
Why You’ll Love This Recipe
- Decadent Layers: This cake features multiple layers of rich chocolate goodness that will satisfy any chocolate lover’s cravings.
- Impressive Presentation: The beautiful layers and shiny ganache make this cake a stunning centerpiece for any occasion.
- Make-Ahead Friendly: You can prepare this cake in advance, making it easy to serve at parties or celebrations.
- Family Favorite: Kids and adults alike will adore this delightful dessert; it’s a hit at every gathering.
- Customizable Flavors: Feel free to play around with different chocolate types or toppings to suit your taste!

Ingredients You’ll Need
This recipe calls for simple, wholesome ingredients that you might already have in your kitchen. Here’s what you’ll need to create this delicious Chocolate Mousse Layer Cake:
For the Chocolate Cake:
- 2 cups all-purpose flour
- 2 cups granulated sugar
- ½ cup Dutch-processed cocoa powder
- 1½ teaspoons baking powder
- 1½ teaspoons baking soda
- ½ teaspoon salt
- ½ cup whole milk
- 2 large eggs
- ½ cup sour cream
- ½ cup vegetable oil
- 1 teaspoon vanilla extract
- 1 teaspoon espresso powder
- 1 cup hot water
For the Chocolate Mousses:
- 4 large egg yolks
- 2 tablespoons granulated sugar
- 2 tablespoons cornstarch
- 1 teaspoon vanilla extract
- 2 cups heavy cream, divided
- 3.5 oz dark chocolate, chopped
- 4.5 oz white chocolate, chopped
For the Ganache:
- 5 oz milk chocolate, chopped
- ⅓ cup heavy cream
Variations
One of the best things about this recipe is its flexibility! Here are a few ideas to customize your Chocolate Mousse Layer Cake:
- Change up the chocolates: Use milk or semi-sweet chocolate instead of dark or white chocolate for different flavor profiles.
- Add a fruit layer: Consider adding fresh raspberries or strawberries between the mousse layers for a fruity twist.
- Incorporate flavors: Add a touch of orange zest or peppermint extract to the mousses for an extra flavor kick.
- Experiment with toppings: Instead of traditional sprinkles, try crushed nuts or coconut flakes on top!
How to Make Chocolate Mousse Layer Cake
Step 1: Make the Cake Batter
Start by sifting together your dry ingredients—flour, sugar, cocoa powder, baking powder, baking soda, and salt—in a large mixing bowl. This step ensures everything is evenly combined and helps create that perfect fluffy texture we all love in cakes. In another bowl, whisk together your wet ingredients: eggs, milk, sour cream, oil, and vanilla until smooth. Don’t forget to dissolve espresso powder in hot water before mixing it into your wet ingredients; this adds depth to the chocolate flavor!
Step 2: Bake the Cake Layers
Preheat your oven to 350°F (180°C). Divide the batter equally between two prepared 8-inch round cake pans lined with parchment paper. Baking time is crucial here—around 35 minutes—so keep an eye on them! A toothpick inserted into the center should come out clean when they’re ready. Once baked, let them cool completely before trimming the tops so they’re nice and flat.
Step 3: Prepare the Mousse Base
In a small saucepan over medium heat, gently heat 1 cup of heavy cream until it starts steaming—this brings out its flavor. Meanwhile, whisk egg yolks with sugar and cornstarch until pale in color. Gradually add hot cream into the yolk mixture while whisking continuously; this process is called tempering and prevents scrambling! Return everything back to the saucepan and cook until thickened into a custard.
Step 4: Melt Chocolate and Combine
Now it’s time for some magic! Divide your custard into two bowls: one for dark chocolate and another for white chocolate. Stir each bowl until completely melted and smooth—this creates two delicious mousses. Don’t forget to whip the remaining heavy cream until stiff peaks form; then fold half into each chocolate mixture gently.
Step 5: Assemble the Cake
Place one trimmed layer of chocolate cake into a dessert ring or springform pan. Spread an even layer of dark chocolate mousse over it followed by the white chocolate mousse on top. Refrigerate for about 30 minutes so that everything sets nicely together before adding the second layer of cake on top.
Step 6: Make the Ganache
For that luscious ganache topping, heat heavy cream until steaming again. Pour it over chopped milk chocolate and let sit for about a minute before stirring until smooth. Let it cool slightly until it’s pourable but not too thick!
Step 7: Finish the Cake
Gently remove your beautifully layered cake from its mold or pan. Pour the glossy ganache over the top; take care not to let it drip down too much on the sides unless you want that charming drippy look! Feel free to decorate with fun toppings like chocolate curls or colorful sprinkles.
And there you have it—a stunning Chocolate Mousse Layer Cake that’s sure to be loved by everyone who gets a slice! Enjoy every moment as you savor this amazing creation.
Pro Tips for Making Chocolate Mousse Layer Cake
Creating the perfect Chocolate Mousse Layer Cake can be a delightful experience, and with these tips, you’ll elevate your baking game!
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Use room temperature ingredients: Bringing your eggs and cream to room temperature helps create a smoother batter and mousse, ensuring better incorporation and texture.
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Don’t rush the cooling process: Allowing the cake layers and mousses to cool completely before assembling prevents melting and ensures clean layers. Patience pays off in a stunning presentation!
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Whip cream to stiff peaks: When whipping the cream for the mousses, ensure it reaches stiff peaks. This will give your mousse that light, airy texture that contrasts beautifully with the dense chocolate cake.
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Chill between layers: Chilling each layer of mousse before adding the next helps maintain structure and prevents them from mixing together. This way, you get distinct layers of flavor in every slice.
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Check your oven temperature: Every oven is different; using an oven thermometer ensures that your cakes bake perfectly without being undercooked or overbaked.
How to Serve Chocolate Mousse Layer Cake
Presenting your Chocolate Mousse Layer Cake beautifully can make it even more enticing! Here are some ideas to make your dessert shine at any gathering.
Garnishes
- Chocolate curls: Use a vegetable peeler on a chocolate bar to create delicate curls that add an elegant touch.
- Fresh berries: A handful of raspberries or strawberries not only adds color but also a fresh tartness that balances the richness of the cake.
- Mint leaves: A few sprigs of fresh mint can brighten up the presentation and add a refreshing hint of flavor.
Side Dishes
- Vanilla ice cream: A scoop of creamy vanilla ice cream complements the rich chocolate flavors perfectly, adding a delightful contrast in texture.
- Fruit salad: A light fruit salad with seasonal fruits provides a refreshing counterbalance to the dense cake, making it a great side option.
- Espresso or coffee: A strong cup of espresso or coffee enhances the chocolate flavor while providing a warm drink that pairs well with dessert.
- Whipped cream: Serving extra whipped cream on the side allows guests to customize their slice—it’s fluffy and delicious!
With these serving suggestions and pro tips, you’re all set to impress friends and family with this decadent Chocolate Mousse Layer Cake. Enjoy every moment of baking—and indulging!

Make Ahead and Storage
This Chocolate Mousse Layer Cake is perfect for meal prep, allowing you to create a stunning dessert ahead of time for any occasion. With proper storage, you can enjoy this indulgent cake beyond the initial serving.
Storing Leftovers
- Wrap individual slices in plastic wrap or store them in an airtight container.
- Keep the cake in the refrigerator for up to 3 days.
- For best texture and flavor, consume the remaining slices within this timeframe.
Freezing
- To freeze, slice the cake into portions and wrap each piece tightly in plastic wrap.
- Place the wrapped slices in a freezer-safe container or bag.
- The cake can be frozen for up to 2 months. Thaw overnight in the refrigerator before enjoying.
Reheating
- This cake is best enjoyed chilled, so no reheating is necessary.
- If desired, allow it to sit at room temperature for about 15 minutes before serving to enhance the flavors.
FAQs
Here are some frequently asked questions about making this delicious Chocolate Mousse Layer Cake.
Can I make this Chocolate Mousse Layer Cake ahead of time?
Absolutely! You can prepare the chocolate cake layers and mousses a day in advance. Just assemble and chill as instructed before serving.
How should I store my Chocolate Mousse Layer Cake?
Store any leftovers in an airtight container in the refrigerator for up to 3 days. You can also freeze slices for longer storage.
What can I use instead of eggs in the mousse?
You can substitute eggs with aquafaba (the liquid from canned chickpeas) as a vegan alternative. Use about 3 tablespoons of aquafaba per egg yolk.
Can I customize the flavors of the mousses?
Yes! Feel free to experiment with different types of chocolate or add flavors like coffee, orange zest, or mint extract to your mousses.
Final Thoughts
I hope you feel inspired to create this delightful Chocolate Mousse Layer Cake! Its rich layers and velvety textures make it a truly special treat for any occasion. Whether you’re celebrating a birthday or simply treating yourself, this cake is sure to impress. Enjoy every moment of making it, and don’t forget to share your creation with friends and family!
Chocolate Mousse Layer Cake
If you’re in search of a dessert that dazzles with both elegance and flavor, look no further than this Chocolate Mousse Layer Cake. This indulgent creation features moist chocolate cake layered with rich dark and white chocolate mousses, all topped with a luscious milk chocolate ganache. Perfect for birthdays, celebrations, or simply to impress friends over coffee, this cake combines a variety of textures and flavors that create a luxurious experience. Surprisingly easy to make, it’s a perfect way to bring sweetness into your life without the hassle!
- Prep Time: 30 minutes
- Cook Time: 35 minutes
- Total Time: 1 hour 5 minutes
- Yield: Approximately 12 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
- 2 cups all-purpose flour
- 2 cups granulated sugar
- ½ cup Dutch-processed cocoa powder
- ½ cup whole milk
- 2 large eggs
- ½ cup sour cream
- ½ cup vegetable oil
- 1 teaspoon vanilla extract
- 1 teaspoon espresso powder
- 1 cup hot water
- 4 large egg yolks
- 2 tablespoons granulated sugar
- 2 tablespoons cornstarch
- 2 cups heavy cream, divided
- 3.5 oz dark chocolate, chopped
- 4.5 oz white chocolate, chopped
- 5 oz milk chocolate, chopped
- ⅓ cup heavy cream
Instructions
- Preheat oven to 350°F (180°C). Prepare two 8-inch round cake pans with parchment paper.
- In a bowl, sift dry ingredients: flour, sugar, cocoa powder, baking powder, baking soda, and salt. In another bowl, whisk wet ingredients: eggs, milk, sour cream, oil, and vanilla until smooth.
- Combine wet and dry mixtures; add dissolved espresso powder in hot water. Divide batter between cake pans; bake for about 35 minutes or until a toothpick comes out clean.
- For the mousse, heat 1 cup of heavy cream until steaming. Whisk egg yolks with sugar and cornstarch until pale; combine gradually with hot cream.
- Melt dark and white chocolates separately; fold whipped heavy cream into each for mousse.
- Layer the cooled cakes with dark mousse on one layer and white mousse on top; chill for at least 30 minutes.
- To make ganache, heat remaining heavy cream and pour over chopped milk chocolate; stir until smooth.
- Pour ganache over assembled cake and decorate as desired.
Nutrition
- Serving Size: 1 serving
- Calories: 400
- Sugar: 38g
- Sodium: 200mg
- Fat: 25g
- Saturated Fat: 15g
- Unsaturated Fat: 10g
- Trans Fat: 0g
- Carbohydrates: 40g
- Fiber: 3g
- Protein: 5g
- Cholesterol: 90mg
