Best Triple Chocolate Mousse Cake Recipe - How to Make Triple Chocolate Mousse Cake

Step 1Preheat oven to 350°. Grease an 8” springform pan with cooking spray. Prepare cake mix according to package instructions and pour about half into pan. (Use remaining batter for cupcakes!) Bake until a toothpick inserted into the middle of the cake comes out clean, about 25 minutes. Let cool completely in pan.

Step 2Make chocolate mousse: In a small bowl, combine gelatin and water and let sit for 5 to 10 minutes. Meanwhile, place chocolate chips in a heatproof bowl. In a small saucepan over medium-high heat, bring 1/2 cup heavy cream to a simmer then remove from heat. Whisk in softened gelatin and stir until completely dissolved. Pour mixture over chocolate chips and whisk until chocolate is melted. Let mixture cool, stirring occasionally.

Step 3 In the bowl of a stand mixer fitted with a whisk attachment or in a large bowl using a hand mixer, beat remaining cream with powdered sugar until stiff peaks form. Stir in about a quarter cup of whipped cream into melted chocolate mixture. Then gently fold in the remaining whipped cream until fully incorporated.

Step 4 Spread mousse over chocolate cake, smoothing the top with an offset spatula. Refrigerate for 30 minutes.

Step 5 Meanwhile, make white chocolate mousse: In a small bowl, combine gelatin and water and let sit for 5 to 10 minutes. Place chocolate chips in a heatproof bowl. In a small saucepan over medium-high heat, bring 1/2 cup heavy cream to a simmer then remove from heat. Whisk in softened gelatin and stir until completely dissolved. Pour mixture over chocolate chips and whisk until chocolate is melted. Let mixture cool, stirring occasionally.

Step 6 In the bowl of a stand mixer fitted with a whisk attachment or in a large bowl using a hand mixer, beat remaining 1 cup cream with powdered sugar and vanilla until stiff peaks form. Stir in about a quarter cup of whipped cream into melted white chocolate mixture. Then gently fold in the remaining whipped cream until fully incorporated.

Step 7 Spread white chocolate mousse over chocolate mousse layer, smoothing the top with an offset spatula. Refrigerate until set, at least 3 hours.

Step 8Garnish with chocolate shavings before serving.