1.
Whisk the egg whites in a clean bowl until stiff.
2.
In another bowl beat together the egg yolks, sugar and amaretto until frothy. Stir in the mascarpone then fold in egg whites.
3.
Soak sponge fingers in coffee and then transfer to a serving bowl (or 4 small dishes). Pour 1/2 mascarpone mixture over the fingers.
4.
Add another layer of soaked sponge fingers on top, followed by the remaining mascarpone mixture.
5.
Refrigerate for at least 4 hours. Dust with cocoa powder before serving.