06/15/2026
Rolls-Royce Coffee Chocolate Mousse Cake ☕🍫
This Rolls-Royce Coffee Chocolate Mousse Cake is rich, silky, and seriously luxurious with a moist coffee-chocolate cake base and a thick cloud of chocolate mousse on top. Save this dreamy bakery-style dessert and tag the chocolate lover who deserves a slice!
Yield: 12 large servings
Ingredients:
• 1 cup cake flour (about 125 g)
• 6 tablespoons dark cocoa powder
• 1 teaspoon baking powder
• 1 1/2 teaspoons baking soda
• 1/4 teaspoon salt
• 2 large eggs
• 1 cup granulated sugar (200 g)
• 1 teaspoon vanilla extract
• 1/2 cup mayonnaise (120 g)
• 2/3 cup water (160 ml)
• 1 teaspoon instant coffee powder
• 1 cup boiling water (240 ml)
For the chocolate mousse:
• 7 oz dark chocolate, chopped (200 g)
• 7 oz milk chocolate, chopped (200 g)
• 3 large pasteurized eggs, separated
• 3 tablespoons cold water
• 1 1/2 teaspoons powdered gelatin
• 1 1/4 cups heavy whipping cream, cold (300 ml)
• 1/2 teaspoon cream of tartar
• 1/4 cup superfine sugar or caster sugar (50 g)
Optional topping:
• Chocolate curls, cocoa powder, or whipped cream
How to make it:
• Preheat your oven to 350°F. Grease and line a 9-inch springform pan with parchment paper.
• In a bowl, whisk together the cake flour, cocoa powder, baking powder, baking soda, and salt.
• In a large mixing bowl, beat the eggs, sugar, and vanilla until slightly thick and glossy. Mix in the mayonnaise and 2/3 cup water until smooth.
• Add the dry ingredients and mix gently. Stir the instant coffee powder into the boiling water, then slowly pour it into the batter while mixing on low. The batter will be thin — that’s what makes the cake so moist.
• Pour into the pan and bake for 28–35 minutes, or until the center springs back and a toothpick comes out with moist crumbs. Cool completely.
• Once cool, place the cake back into a clean springform pan. Add an acetate collar or parchment strip around the inside edge for a tall, neat mousse layer.
• For the mousse, sprinkle the gelatin over the cold water and let it bloom for 5 minutes. Warm it gently until dissolved, then set aside.
• Melt the dark chocolate and milk chocolate together until smooth. Let it cool until warm, not hot.
• Whisk the egg yolks into the melted chocolate, then whisk in the dissolved gelatin.
• Whip the cold cream to soft peaks, then gently fold it into the chocolate mixture until smooth and fluffy.
• In a clean bowl, beat the egg whites with cream of tartar until foamy. Slowly add the sugar and beat until glossy peaks form. Fold this into the chocolate mousse mixture in batches.
• Spread the mousse over the cooled cake base and smooth the top. Chill for at least 6 hours, or overnight for the best bakery-style texture.
• Decorate with chocolate curls, cocoa powder, or whipped cream before slicing. For clean slices of Rolls-Royce Coffee Chocolate Mousse Cake, use a warm knife and wipe it between cuts.
Serve chilled for a thick, creamy, coffee-kissed chocolate dessert that feels extra special.