Beat the egg whites with the sifted powdered sugar, slowly becoming harder. Mix the marzipan with the butter until creamy. Pull the flour into the egg whites and then mix in the marzipan butter.
Wash the currants, drain them and remove them from the stems. Spread the berries on four ovenproof bowls, cover with the batter and bake in the preheated oven at 250 ° C for about 4-5 minutes.