Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      cups          mascarpone cheese
   3      cups          heavy cream
     1/4  cup           powdered sugar
     1/2  teaspoon      vanilla
   3      tablespoons   coffee liqueur
   1      teaspoon      instant coffee
   1      whole         sponge cake
     1/4  cup           cocoa powder

Preparation:

Combine mascarpone cheese, cream, sugar, vanilla, coffee liqueur, and instant coffee in a mixing bowl and whip until stiff. Split sponge cake in thirds. Spread 1/2 of cream mixture on bottom layer. Place middle layer on it, spread with remaining cream. Replace top layer. Refrigerate for 1 hour. Just before serving, dust top of cake with cocoa powder.