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Best Triple Chocolate Mousse Cake

Triple Chocolate Mousse Cake - A Smooth, Layered Chocolate Dessert

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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 4 servings

Ingredients
  

  • For the chocolate crust: 1 1/2 cups (150 g) chocolate wafer cookie crumbs or finely crushed chocolate graham crackers
  • 5 tablespoons (70 g) unsalted butter, melted
  • 2 tablespoons (25 g) granulated sugar
  • Pinch of fine sea salt
  • For the dark chocolate mousse: 6 oz (170 g) dark chocolate (60–70%), finely chopped
  • 2 tablespoons (28 g) unsalted butter
  • 1 teaspoon vanilla extract
  • 1 teaspoon powdered gelatin
  • 2 tablespoons cold water
  • 3/4 cup (180 ml) heavy cream, chilled
  • 2 tablespoons (25 g) granulated sugar
  • For the milk chocolate mousse: 6 oz (170 g) milk chocolate, finely chopped
  • 1 teaspoon powdered gelatin
  • 2 tablespoons cold water
  • 3/4 cup (180 ml) heavy cream, chilled
  • 1 tablespoon (12 g) granulated sugar
  • 1/2 teaspoon vanilla extract
  • For the white chocolate mousse: 6 oz (170 g) white chocolate, finely chopped
  • 1 teaspoon powdered gelatin
  • 2 tablespoons cold water
  • 3/4 cup (180 ml) heavy cream, chilled
  • 1/2 teaspoon vanilla extract
  • Pinch of salt
  • Optional toppings: Shaved chocolate, cocoa powder, chocolate curls, fresh berries

Instructions
 

  • Prep the pan: Line the bottom of a 9-inch (23 cm) springform pan with parchment. Lightly grease the sides or line with acetate for extra-smooth edges.
  • Make the crust: Stir crumbs, sugar, and salt with melted butter until evenly moistened. Press firmly into an even layer in the pan. Bake at 350°F (175°C) for 8–10 minutes. Cool completely.
  • Bloom the first gelatin: In a small bowl, sprinkle 1 teaspoon gelatin over 2 tablespoons cold water. Let stand 5 minutes.
  • Start the dark chocolate base: Place chopped dark chocolate and butter in a heatproof bowl. Melt gently over a saucepan of barely simmering water or in short microwave bursts. Stir until smooth, then mix in vanilla. Cool to lukewarm.
  • Melt the gelatin: Warm the bloomed gelatin 5–10 seconds in the microwave until just melted. Stir it into the lukewarm dark chocolate mixture.
  • Whip the cream: Beat 3/4 cup cream with 2 tablespoons sugar to soft peaks—creamy and slightly droopy, not stiff.
  • Fold and set the first layer: Gently fold whipped cream into the chocolate in two additions. Spread over the cooled crust. Smooth the top. Chill 20–30 minutes until lightly set.
  • Repeat for milk chocolate: Bloom 1 teaspoon gelatin in 2 tablespoons cold water. Melt milk chocolate as before and cool to lukewarm. Melt and stir in the gelatin, then fold in whipped cream (3/4 cup cream, 1 tablespoon sugar, 1/2 teaspoon vanilla) whipped to soft peaks. Pour and smooth over the dark chocolate layer. Chill 20–30 minutes.
  • Finish with white chocolate: Bloom 1 teaspoon gelatin in 2 tablespoons cold water. Melt white chocolate and cool to barely warm. Melt and stir in the gelatin with a pinch of salt and 1/2 teaspoon vanilla. Whip 3/4 cup cream to soft peaks and fold in. Spread over the milk chocolate layer. Smooth the top.
  • Chill to set: Cover lightly and refrigerate at least 6 hours, preferably overnight, until fully firm and sliceable.
  • Unmold and garnish: Run a thin knife around the edge or remove the acetate. Release the springform ring. Top with shaved chocolate, curls, or berries. Slice with a warm, dry knife for clean layers.