Chocolate Mousse Cake with Rich Chocolate Ganache

Ingredients
For the Chocolate Cake Base
1½ cups all-purpose flour
1 cup granulated sugar
½ cup unsweetened cocoa powder
1 teaspoon baking powder
½ teaspoon baking soda
¼ teaspoon salt
2 large eggs
¾ cup milk
½ cup vegetable oil
1 teaspoon vanilla extract
¾ cup hot water or hot coffee (to enhance chocolate flavor)
For the Chocolate Mousse Filling
1½ cups heavy whipping cream (cold)
200 g dark chocolate (chopped)
2 tablespoons powdered sugar
1 teaspoon vanilla extract
For the Chocolate Ganache Topping
1 cup heavy cream
200 g dark chocolate (finely chopped)
1 tablespoon butter (optional, for shine)
Instructions
Step 1: Prepare the Chocolate Cake
Preheat your oven to 170°C (340°F). Grease and line a square or rectangular baking pan with parchment paper.
In a large mixing bowl, sift together the flour, cocoa powder, baking powder, baking soda, and salt. Add the sugar and mix well.
In another bowl, whisk the eggs, milk, vegetable oil, and vanilla extract until smooth. Gradually add the wet ingredients to the dry mixture, stirring gently until well combined. Slowly pour in the hot water or coffee while mixing; the batter will be thin, which is normal.
Pour the batter into the prepared pan and bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean. Remove from the oven and allow the cake to cool completely.
Step 2: Prepare the Chocolate Mousse
Melt the dark chocolate using a double boiler or microwave, then set aside to cool slightly.
In a separate bowl, whip the cold heavy cream with powdered sugar and vanilla extract until soft peaks form. Gently fold the melted chocolate into the whipped cream using a spatula, being careful not to deflate the mousse. Refrigerate for 20–30 minutes to firm slightly.
Step 3: Assemble the Cake
Once the cake has cooled, slice it horizontally into two layers if desired. Spread an even layer of chocolate mousse over the cake base. Place the second layer on top (optional) and gently press down.
Refrigerate the assembled cake for at least 1 hour to allow the mousse to set properly.
Step 4: Prepare the Chocolate Ganache
Heat the heavy cream in a saucepan until it just begins to simmer (do not boil). Pour the hot cream over the chopped chocolate in a bowl. Let it sit for 2 minutes, then stir gently until smooth and glossy. Add butter if desired for extra shine.
Allow the ganache to cool slightly, then pour it evenly over the chilled cake, letting it spread naturally over the surface.
Step 5: Chill and Serve
Return the cake to the refrigerator for at least 2 hours before slicing. This will give the cake its rich texture and clean layers.
Serve chilled and garnish with cocoa powder, chocolate shavings, or fresh mint leaves for an elegant presentation.
Tips for Best Results
Use high-quality dark chocolate for a deeper flavor.
Chilling the cake overnight enhances the taste and texture.
This cake pairs perfectly with coffee or a glass of cold milk.