Beat eggs with sugar foam, add vanilla. Add liqueur and fat, without stopping stirring. Add sifted flour and baking powder. 2/3 of the dough is poured into a greased and floured cake bigger form. The rest of the dough, add 1 and 1/2 tbsp cocoa and coffee. Pour batter over the other in the form and with a fork stir spiral. Bake in preheated oven 50-60 minutes. Finished cake sprinkled with powdered sugar mixed with cocoa rest.