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No-Bake Triple Chocolate Mousse Cake


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  • Author: Mia
  • Total Time: 5 hours
  • Yield: 12 slices
  • Diet: Vegetarian

Description

This No-Bake Triple Chocolate Mousse Cake features silky layers of dark, milk, and white chocolate mousse on a crunchy Oreo crust. Elegant yet simple, it’s a perfect make-ahead dessert for any celebration — no oven required.


Ingredients

  • 24 Oreo cookies (for the crust)
  • 1/4 cup (60g) unsalted butter, melted
  • 150g semi-sweet (dark) chocolate
  • 150g milk chocolate
  • 150g white chocolate
  • 3 cups (720ml) heavy whipping cream (divided, 1 cup per layer)
  • 3 teaspoons gelatin (or agar-agar for vegetarian option, divided)
  • 6 tablespoons cold water (divided, 2 tbsp per layer)
  • Optional: cocoa powder, fresh berries for decoration

Instructions

  1. Crush Oreo cookies into fine crumbs and mix with melted butter. Press the mixture into the bottom of an 8-inch (20 cm) springform pan. Refrigerate while preparing the mousse layers.
  2. For the dark chocolate mousse: Melt semi-sweet chocolate using a double boiler. Bloom 1 tsp gelatin in 2 tbsp cold water, dissolve it, and mix into the melted chocolate. Let cool. Whip 1 cup cream to stiff peaks and fold into the chocolate mixture. Pour over the crust and chill for 15–20 minutes.
  3. For the milk chocolate mousse: Repeat the process using milk chocolate and 1 tsp gelatin bloomed in 2 tbsp cold water. Let cool, fold in whipped cream, and pour over the set dark chocolate layer. Chill again for 15–20 minutes.
  4. For the white chocolate mousse: Repeat the process using white chocolate and 1 tsp gelatin bloomed in 2 tbsp cold water. Fold in whipped cream and pour over the set milk chocolate layer. Refrigerate the entire cake for at least 4 hours or overnight.
  5. To serve: Run a knife around the edge to release the cake. Dust with cocoa powder and top with fresh berries if desired.

Notes

  • Use high-quality chocolate for best results.
  • Chill each mousse layer for 15–20 minutes before adding the next to prevent mixing.
  • For a vegetarian version, use agar-agar instead of gelatin.
  • Gluten-free cookies can be substituted for Oreos for a gluten-free version.
  • This cake is best made a day in advance for optimal texture and flavor.
  • Prep Time: 1 hour
  • Cook Time: 0 minutes
  • Category: Dessert
  • Method: No-Bake
  • Cuisine: American

Nutrition

  • Serving Size: 1 slice
  • Calories: 420
  • Sugar: 28g
  • Sodium: 160mg
  • Fat: 32g
  • Saturated Fat: 19g
  • Unsaturated Fat: 11g
  • Trans Fat: 0g
  • Carbohydrates: 32g
  • Fiber: 2g
  • Protein: 4g
  • Cholesterol: 70mg