Description

This Chocolate Raspberry Mousse Cake is a decadent dessert featuring a light chocolate sponge base topped with a smooth and airy raspberry mousse. The rich layers of dark chocolate are perfectly balanced by the vibrant freshness of raspberry puree, finished elegantly with fresh raspberries and chocolate shavings. Ideal for special occasions, this cake combines baking and stovetop techniques to create an impressive yet approachable treat.

Ingredients

Scale

Chocolate Sponge

3 large eggs, room temperature
55 g light brown sugar
65 g granulated sugar
1 teaspoon vanilla extract
65 g plain flour (all-purpose)
15 g cocoa powder
1 teaspoon baking powder
½ teaspoon espresso powder
¼ teaspoon salt
75 g dark chocolate 75%, melted

Raspberry Mousse

2¼ teaspoons powdered gelatine
45 ml fresh lemon juice
400 g fresh raspberries (frozen can be substituted)
100 g granulated sugar
480 ml double cream (heavy cream), cold

Decoration

125 g fresh raspberries
50 g dark chocolate shavings

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Instructions

Prepare Chocolate Sponge: Grease and line the base and sides of a 23cm (9-inch) springform pan. Preheat the oven to 180°C (350°F).
Whip Eggs & Sugar: In a medium bowl, combine eggs, light brown sugar, granulated sugar, and vanilla extract. Use a hand mixer to whip on medium-high speed for about 4 minutes until the mixture is light, creamy, and ribbons form when the whisk is lifted.
Add Dry Ingredients: Sift in the flour, cocoa powder, baking powder, espresso powder, and salt. Mix on low speed until just a few streaks of flour remain to avoid overmixing.
Incorporate Melted Chocolate: Carefully fold the melted dark chocolate into the batter using a rubber spatula, scraping the bowl to ensure a smooth, even mixture.
Bake Sponge: Pour the batter into the prepared pan, tap to release air bubbles and smooth the surface with an offset spatula. Bake for 15-20 minutes until the center springs back when pressed.
Cool and Flatten Sponge: Transfer the sponge to a wire rack and cool to room temperature. Press the wrinkly top flat using a flat glass or measuring cup base. Cover and refrigerate until needed to firm up.
Bloom Gelatine: In a small bowl, combine lemon juice with powdered gelatine. Let sit for a few minutes to soften and bloom.
Blend Raspberries: Puree the fresh raspberries in a blender until smooth.
Strain Raspberry Puree: Pass the puree through a fine sieve over a saucepan to remove seeds, leaving about 300 ml of smooth pulp.
Heat Raspberry Puree: Place the strained puree on medium-low heat, add the granulated sugar, and simmer while stirring frequently to dissolve the sugar.
Dissolve Gelatine: Stir the softened gelatine into the hot raspberry puree and heat gently without boiling until completely dissolved.
Strain Again & Cool: Strain the puree again to remove any lumps. Set aside to cool to room temperature, approximately 20 minutes.
Whip Cream & Combine: Whip the cold double cream to soft peaks. Gently fold in the cooled raspberry puree in three parts to maintain an airy texture.
Assemble Mousse Cake: Pour the raspberry mousse over the chilled chocolate sponge in the springform pan. Smooth the surface with an offset spatula. Cover and refrigerate for at least 3 hours or preferably overnight to set completely.
Decorate & Serve: Remove the cake from the pan, peel off the baking paper collar, and smooth edges with a warm spatula if needed. Decorate with fresh raspberries and dark chocolate shavings. Slice with a warm sharp knife and serve immediately.

Notes

Use room temperature eggs to help achieve a light, airy sponge.
If using frozen raspberries, thaw and drain excess liquid before pureeing.
Ensure the gelatine does not boil to maintain its setting properties.
Pressing the sponge flat after baking ensures an even base for the mousse layer.
Refrigerate the mousse cake overnight for best texture and flavor melding.
Warming the knife before slicing helps achieve clean cake slices.
Double cream can be substituted with heavy cream where double cream is unavailable.