2 cups mascarpone cheese
3 cups heavy cream
1/4 cup powdered sugar
1/2 teaspoon vanilla extract
3 tablespoons coffee liqueur
1 teaspoon instant coffee
1 (10-inch) sponge cake
1/4 cup unsweetened cocoa powder
Combine in a large bowl, mascarpone cheese, cream, sugar, vanilla, coffee liqueur, and instant coffee. Whip until stiff.
Split sponge cake in half, creating a top and bottom layer. Spread cream mixture on bottom layer, and replace top half of cake. Refrigerate for 1 hour. Just before serving, dust top of cake with cocoa powder.
Serves 12 to 14.