Alright, get ready for something absolutely indulgent—Chocolate Mousse Cake. Picture this: a decadent, melt-in-your-mouth layer of rich chocolate mousse sitting on top of a perfectly moist, fudgy cake base. It’s like a dream come true for any chocolate lover. Whether you’re making it for a special occasion or just because you deserve a treat, this cake is guaranteed to satisfy every craving. Trust me, this dessert will have you (and anyone you share it with) swooning with every bite.
Why You’ll Love Chocolate Mousse Cake
This isn’t just a cake; it’s an experience. The balance of airy mousse and dense chocolate cake creates the perfect bite every single time. And here’s why it’s going to be your new favorite:
- Versatile: Whether it’s for a birthday, holiday gathering, or a quiet night in, this chocolate mousse cake can be dressed up for any occasion or just enjoyed on its own.
- Impressive: The layers of mousse and cake look absolutely stunning. When you serve this, you’ll definitely hear a few “wow’s” from your guests. It’s the kind of dessert that makes you feel like a total baking pro.
- Comforting: Every bite is the definition of comfort food. Soft, creamy mousse paired with a decadent cake is basically the hug you’ve been waiting for.
- Quick and Easy: You might think something this luxurious would be complicated to make, but I promise—it’s actually pretty straightforward. No need to stress; just follow the simple steps, and you’ll have an extraordinary dessert.
- Crowd-Pleasing: Whether you’re serving family, friends, or just indulging by yourself, this cake is guaranteed to be a hit with chocolate lovers everywhere. It’s rich but not overwhelmingly so, making it the perfect treat for all.

Ingredients
The ingredients for this Chocolate Mousse Cake are simple but powerful. Let’s break them down:
Chocolate Cake Mix
This is the base of the cake—chocolatey, moist, and oh-so-rich. It creates a soft, spongy layer that contrasts beautifully with the light, airy mousse topping.
Butter
Butter brings richness to the cake batter and helps achieve that perfect texture. Plus, it gives the cake a subtle, decadent flavor.
Eggs
Eggs are the binding agents that hold everything together. They give the cake a light, tender crumb and help the mousse layer stay firm.
Heavy Cream
Heavy cream is the key to the rich, smooth texture of the mousse. It helps create that dreamy, melt-in-your-mouth consistency that makes this cake irresistible.
Semi-Sweet Chocolate
The semi-sweet chocolate provides just the right amount of sweetness for the mousse, giving it that deep, indulgent chocolate flavor. It’s essential to balance out the richness of the cake.
Sugar
Sugar sweetens both the cake and mousse without overpowering the natural chocolate flavor. It’s the perfect amount of sweetness to make every bite irresistible.
Vanilla Extract
Vanilla enhances the flavor of the chocolate, giving it depth and making the overall dessert even more delightful.
(Note: the full ingredients list, including measurements, is provided in the recipe card directly below.)
Instructions
Let’s dive into creating this gorgeous Chocolate Mousse Cake:
Preheat Your Oven
Start by preheating your oven to 350°F. This helps ensure even baking and creates that perfect texture for the cake.
Prepare the Chocolate Cake Base
In a large bowl, combine the chocolate cake mix, eggs, melted butter, and water. Stir everything together until the batter is smooth and well-combined. Pour the batter into a greased round cake pan, and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean. Let it cool completely before adding the mousse.
Make the Mousse
While your cake is cooling, it’s time to make the mousse! In a heatproof bowl, melt the semi-sweet chocolate and heavy cream over a double boiler, stirring constantly until smooth and completely melted. Once melted, remove from heat and let it cool slightly.
Whip the Cream
In a separate bowl, whip the remaining heavy cream until soft peaks form. Slowly fold the whipped cream into the melted chocolate mixture until everything is fully combined and smooth.
Assemble the Cake
Once your cake is completely cool, spread the chocolate mousse over the top, smoothing it out with a spatula to cover the entire surface evenly. Refrigerate the cake for at least 2 hours to let the mousse set and firm up.
Serve and Enjoy
After the mousse has set, slice into the cake, serve chilled, and enjoy the luxurious layers of cake and mousse. It’s truly a treat you’ll remember!
Nutrition Facts
Servings: 12
Calories per serving: 350
Preparation Time
Prep Time: 20 minutes
Cook Time: 35 minutes
Total Time: 2 hours 30 minutes (including chilling time)
How to Serve Chocolate Mousse Cake
This cake is stunning on its own, but here are a few ideas to take it to the next level:
- Whipped Cream: Top with a dollop of freshly whipped cream for a lighter contrast to the rich mousse.
- Berries: Fresh raspberries, strawberries, or blueberries add a beautiful pop of color and a refreshing tartness that complements the sweetness of the cake.
- Chocolate Shavings: Sprinkle some shaved chocolate or cocoa powder on top to add extra decadence and visual appeal.
- Mint Leaves: Add a couple of fresh mint leaves for a hint of freshness and a touch of elegance.
Additional Tips
Here are some helpful tips to ensure your Chocolate Mousse Cake turns out perfect:
- Let the Cake Cool Completely: Make sure your cake is fully cooled before adding the mousse. If it’s still warm, it could cause the mousse to melt and lose its texture.
- Use Good Quality Chocolate: The better the chocolate, the better your mousse will taste. Choose a semi-sweet chocolate you love, as it really impacts the flavor of the mousse.
- Chill the Cake: Don’t skip the chilling step! It’s crucial for the mousse to set properly, giving you that light, airy texture.
- Customize the Cake: Feel free to add a layer of fruit, like raspberries, between the cake and mousse for an added surprise of flavor.
FAQ Section
Q1: Can I use dark chocolate for the mousse?
A1: Absolutely! Dark chocolate will give the mousse a richer, more intense flavor. Just make sure it’s not too bitter, as you still want a nice balance of sweetness.
Q2: Can I make this cake ahead of time?
A2: Yes! You can make the cake and mousse the day before. Just store it in the fridge and let the mousse set overnight for the best results.
Q3: Can I make this cake gluten-free?
A3: Yes! Use a gluten-free chocolate cake mix or a homemade gluten-free cake recipe. Just ensure your mousse ingredients are also gluten-free.
Q4: How do I store leftovers?
A4: Store any leftovers in an airtight container in the fridge for up to 3 days. This cake tastes even better the next day!
Q5: Can I freeze this cake?
A5: Yes, you can freeze the cake before adding the mousse. Wrap it tightly and freeze for up to a month. Thaw before adding the mousse.
Q6: Can I add a topping to the mousse?
A6: Absolutely! Shaved chocolate, crushed nuts, or even caramel drizzle would all be delicious additions.
Q7: How do I prevent the mousse from melting?
A7: Be sure the cake is completely cool before adding the mousse, and let it chill in the fridge long enough to allow the mousse to set fully.
Q8: Can I use milk chocolate instead of semi-sweet?
A8: Yes, milk chocolate will make the mousse sweeter and creamier, but it may not have the same depth of flavor as semi-sweet chocolate.
Q9: Can I make this cake in a different pan?
A9: Yes! If you don’t have a round cake pan, you can use a square or rectangular one. Just adjust the baking time as needed.
Q10: What’s the best way to slice the cake?
A10: For clean slices, dip your knife in hot water, wipe it dry, and slice. This will help the mousse stay intact and give you beautiful cuts.
Conclusion
Chocolate Mousse Cake is the perfect dessert to elevate any occasion or just indulge in on a lazy afternoon. With its rich layers of cake and smooth, velvety mousse, it’s the kind of dessert that makes you feel special with every bite. Whether you’re a novice baker or a seasoned pro, this cake is surprisingly simple to make, but the results are nothing short of spectacular. So, grab those ingredients, preheat your oven, and get ready to impress—this cake will quickly become a new favorite in your recipe box!
PrintChocolate Mousse Cake
Indulge in a decadent Chocolate Mousse Cake with layers of rich chocolate mousse sitting on top of a fudgy cake base. Perfect for any occasion or just because, this dessert will have everyone swooning with every bite.
- Prep Time: 20 minutes
- Cook Time: 35 minutes
- Total Time: 2 hours 30 minutes
- Yield: 12 servings 1x
- Category: Dessert
- Method: baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
For the crust:
- 1 cup chocolate cookie crumbs
- 2 tablespoons unsalted butter, melted
For the dark chocolate mousse:
- 1 cup heavy cream
- 200g dark chocolate, chopped
- 2 tablespoons sugar
For the milk chocolate mousse:
- 1 cup heavy cream
- 200g milk chocolate, chopped
- 2 tablespoons sugar
For the white chocolate mousse:
- 1 cup heavy cream
- 200g white chocolate, chopped
- 2 tablespoons sugar
For garnish:
- Chocolate shavings
Instructions
- Preheat your oven: Preheat to 350°F (175°C).
- Prepare the chocolate cake base: Combine chocolate cake mix, eggs, melted butter, and water. Stir until smooth. Pour into a greased round cake pan and bake for 30-35 minutes or until a toothpick inserted comes out clean. Let it cool completely.
- Make the mousse:
- Dark chocolate mousse: Melt semi-sweet chocolate and heavy cream over a double boiler. Stir until smooth. Let cool slightly.
- Whip the cream: Whip remaining heavy cream until soft peaks form. Fold the whipped cream into the melted chocolate mixture.
- Assemble the cake: Spread mousse over the cooled cake. Refrigerate for at least 2 hours to set.
- Serve and enjoy: Slice and serve chilled with garnishes like whipped cream, berries, or chocolate shavings.
Notes
- Let the cake cool completely before adding the mousse.
- Use high-quality chocolate for the best flavor.
- Refrigerate the cake long enough to allow the mousse to set.
Nutrition
- Serving Size: 1 slice (1/12 of cake)
- Calories: 350kcal
- Sugar: 25g
- Sodium: 55mg
- Fat: 24g
- Saturated Fat: 12g
- Unsaturated Fat: 9g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 50mg