Introduction

This Easy Chocolate Mousse Cake combines a rich, moist chocolate cake base with a silky mousse topping and a glossy chocolate ganache finish. It’s an impressive yet approachable dessert perfect for any special occasion or when you want to treat yourself to something decadent.

Easy Chocolate Mousse Cake Recipe - Recipe Image

Ingredients

1 Cup (133g) all purpose flour
3/4 Cup (150g) granulated sugar
1/3 Cup (30g) unsweetened natural cocoa powder
1 tsp baking soda
1/2 tsp baking powder
1/4 tsp salt
1/4 Cup (60ml) vegetable oil
1 large egg, room temperature
1 tsp pure vanilla extract
1/2 Cup (120ml) full-fat buttermilk*, room temperature
1/2 Cup (120ml) hot coffee or hot water
2 Cups (370g) semi-sweet chocolate chips
2 1/3 Cups (560ml) heavy whipping cream, divided
2 Tbsp powdered sugar
2 tsp pure vanilla extract
1 tsp instant coffee or espresso powder (optional)
1/2 Cup (93g) semi-sweet chocolate chips (for ganache)
1/2 Cup (120ml) heavy whipping cream (for ganache)
3 Oz fresh raspberries (for garnish)
2 Oz chocolate covered espresso beans (for garnish)

Instructions

Step 1: Preheat the oven to 350ºF (177ºC). Prepare a 9-inch springform pan by spraying the sides with cooking spray and fitting the bottom with a parchment circle. Optionally, wrap aluminum foil around the outside to prevent leaks.
Step 2: In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt. Add the vegetable oil, egg, vanilla, and buttermilk, and whisk until smooth. Slowly pour in the hot coffee or water while whisking until combined. The batter will be thin.
Step 3: Pour the batter into the prepared pan and bake for 25-30 minutes. Test doneness with a toothpick; it should come out clean. Cool completely before proceeding.
Step 4: For the mousse, place 2 cups of semi-sweet chocolate chips in a heatproof bowl. Heat 1 cup (240ml) of heavy cream in a small saucepan until it simmers around the edges. Pour the hot cream over the chocolate and whisk until smooth and shiny. Let cool to room temperature (about 25 minutes).
Step 5: Using a stand mixer or hand mixer, whip the remaining 1 1/3 cups (320ml) of heavy cream with powdered sugar, vanilla, and instant coffee (if using) on low speed until combined. Increase speed to high and beat until stiff peaks form, about 4 minutes.
Step 6: Gently fold the whipped cream mixture into the cooled ganache until no streaks remain. Set aside.
Step 7: Remove the cooled cake from the pan. Level the top with a serrated knife if needed. Peel off the parchment from the bottom and return the cake to the springform pan.
Step 8: Wrap an acetate cake collar around the cake and secure it with tape. Spread the chocolate mousse evenly over the cake, smoothing the surface. Refrigerate for at least 6 hours or overnight to set.
Step 9: For the ganache topping, place 1/2 cup semi-sweet chocolate chips in a bowl. Heat 1/2 cup heavy cream until simmering, then pour over the chocolate. Whisk until smooth and let cool to room temperature, about 20 minutes.
Step 10: Once the mousse is set, remove the springform collar and acetate. Pour the cooled ganache over the top and spread so it drips down the sides slightly.
Step 11: Garnish the cake with fresh raspberries and chocolate covered espresso beans in a crescent pattern. Serve immediately or refrigerate until ready to serve.

Tips & Variations

Use freshly brewed coffee for a richer chocolate flavor, or substitute hot water if coffee is unavailable.
If you don’t have buttermilk, stir 1/2 tablespoon of lemon juice or white vinegar into 1/2 cup of milk and let it sit for 5 minutes before using.
The optional instant coffee or espresso powder in the mousse enhances the chocolate depth but can be omitted for a milder taste.
An acetate cake collar helps keep mousse edges clean and smooth but can be skipped if you’re careful while assembling.
Garnish with fresh berries or your favorite nuts for added texture and flavor variations.

Storage

Store the cake covered in the refrigerator for up to 3 days. Keep it on a cake stand or in an airtight container to prevent it from absorbing other odors. Allow the cake to sit at room temperature for about 15 minutes before serving for the best texture. Leftover slices can be gently reheated in a warm oven for a few minutes if desired, but the mousse is best served chilled.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I make this cake ahead of time?

Yes, the cake can be assembled and refrigerated overnight. If making ahead, prepare the ganache shortly before serving for the freshest finish. The cake holds well and actually tastes better after the flavors meld overnight.

What if I don’t have a springform pan?

A springform pan is ideal for easy cake removal and assembling layered mousse cakes, but you can use a regular cake pan lined with parchment. Carefully invert the cake and peel off the paper before assembling the mousse. Just be gentle to avoid damaging the cake layer.

Easy Chocolate Mousse Cake Recipe

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★★★★★

4.5 from 78 reviews

This Easy Chocolate Mousse Cake is a decadent dessert featuring a moist chocolate cake base topped with a luscious chocolate mousse layer and finished with a smooth chocolate ganache. Perfect for special occasions or any chocolate lover craving a rich, creamy treat, this cake combines the flavors of coffee-infused chocolate with light, airy mousse and fresh raspberry garnish for a beautiful and delicious presentation.

Author: Zane
Prep Time: 20 minutes
Cook Time: 30 minutes
Total Time: 7 hours 30 minutes (including chilling time)
Yield: 8–10 servings 1x
Category: Dessert
Method: Baking
Cuisine: American

Ingredients

Scale

Chocolate Cake

1 Cup (133g) all purpose flour
3/4 Cup (150g) granulated sugar
1/3 Cup (30g) unsweetened natural cocoa powder
1 tsp baking soda
1/2 tsp baking powder
1/4 tsp salt
1/4 Cup (60ml) vegetable oil
1 large egg, room temperature
1 tsp pure vanilla extract
1/2 Cup (120ml) full-fat buttermilk*, room temperature (see notes for DIY)
1/2 Cup (120ml) hot coffee or hot water

Chocolate Mousse

2 Cups (370g) semi-sweet chocolate chips
2 1/3 Cups (560ml) heavy whipping cream, divided
2 Tbsp powdered sugar
2 tsp pure vanilla extract
1 tsp instant coffee or espresso powder (optional)

Chocolate Ganache and Garnish

1/2 Cup (93g) semi-sweet chocolate chips
1/2 Cup (120ml) heavy whipping cream
3 Oz fresh raspberries
2 Oz chocolate covered espresso beans

Instructions

Preheat and Prepare Pan: Preheat your oven to 350ºF (177ºC). Spray the sides of a 9-inch springform pan with cooking spray and line the bottom with a parchment circle. Optionally, wrap aluminum foil around the outside for leak protection.
Mix Dry Ingredients: In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt until combined.
Combine Wet Ingredients: Add vegetable oil, egg, vanilla extract, and buttermilk to the dry ingredients and whisk until smooth. Slowly pour in the hot coffee or hot water while whisking to create a thin batter.
Bake the Cake: Pour batter into the prepared pan and bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean. Allow the cake to cool completely before proceeding.
Melt Chocolate for Mousse: Place semi-sweet chocolate chips in a heatproof bowl. Heat 1 cup (240ml) heavy cream in a small saucepan over medium-low heat until it just begins to simmer around the edges. Pour the hot cream over the chocolate chips and whisk until smooth to create ganache. Let cool to room temperature (~25 minutes).
Whip Remaining Cream: In a stand mixer bowl fitted with a whisk (or with a hand mixer), combine remaining 1 1/3 cups (320ml) heavy cream, powdered sugar, vanilla extract, and instant coffee powder if using. Beat on low until combined, then increase speed to high and whip until stiff peaks form (about 4 minutes).
Fold Mousse: Gently fold the whipped cream mixture into the cooled ganache until fully incorporated and no streaks remain.
Prepare Cake Layer: Remove the cooled cake from the springform pan. Level the top with a serrated knife or cake leveler. Carefully peel off the parchment from the bottom and place the cake back into the pan.
Add Acetate Collar: Wrap an acetate cake collar around the cake layer and secure it with tape to hold the mousse in place as it sets.
Assemble Mousse Layer: Spread the chocolate mousse evenly over the cake layer with an angled spatula until it reaches the edges. Smooth the surface and refrigerate for at least 6 hours or overnight to set.
Make Chocolate Ganache: Place 1/2 cup (93g) semi-sweet chocolate chips in a bowl. Heat 1/2 cup (120ml) heavy cream over medium heat until simmering. Pour the hot cream over the chocolate and whisk until smooth. Cool to room temperature (~20 minutes).
Unmold and Decorate: Once the mousse cake has set, remove the springform collar and unwrap the acetate. Pour the cooled ganache over the top of the cake, spreading it to gently drip over the sides.
Garnish: Decorate the ganache-topped cake with fresh raspberries and chocolate-covered espresso beans arranged in a crescent pattern.
Serve: Serve immediately or refrigerate until ready to slice and serve.

Notes

Full-fat buttermilk can be made by adding 1/2 tablespoon lemon juice or white vinegar to 1/2 cup (120ml) whole milk; let it sit for 5-10 minutes.
If making ahead, ganache can be prepared and stored in the fridge; reheat gently in short bursts in the microwave before pouring.
Ensure ganache is cooled to room temperature before folding mousse and before pouring over the cake to prevent melting layers.
Wrap the outside of the springform pan with aluminum foil to prevent leakage if your pan is not leak-proof.
The optional instant coffee powder enhances the chocolate flavor but can be omitted for a pure chocolate taste.

Keywords: chocolate mousse cake, easy chocolate cake, chocolate dessert, mousse dessert, chocolate ganache, layered cake