3 Sieve the flour, baking powder and cocoa then stir through the hazelnuts and coffee.
4 Gently fold through the egg mixture. Three quarters of the way through, add the vanilla and melted butter. Continue to fold very gently.
5 Bake for approximately 25 minutes or until set. Remove and let sit for 5 minutes before removing from the tin and cooling on a wire rack.
6 Slice the sponge in half and spread the base with the hazelnut paste. Spread with whipped cream and then carefully place on the top layer, dusting generously with cocoa powder.