Step 3
Meanwhile, make chocolate mousse: Place chocolate, vanilla and half the cream in a saucepan over medium-low heat. Cook, stirring constantly, for 3 to 4 minutes or until smooth. Remove from heat. Cool for 15 minutes. Using an electric mixer, beat remaining cream until soft peaks form. Fold chocolate mixture into cream. Gently pour over ganache layer. Refrigerate overnight. Dust with cocoa. Serve.