Prepare a shortcrust pastry using the ingredients for the dough. Wrap it in foil and put it in the refrigerator for about an hour.
Beat the egg whites out of the 4 egg whites. When this is almost solid, pour in the sugar and then stir in the starch.
Grease a springform pan, roll out the dough and place in the form. Pull up an edge. Carefully fold the currants under the egg whites and fill the mold.
Bake in a preheated oven at 160 ° C for about 50 minutes.
Fry the almond flakes in 1 tablespoon butter, possibly add a little sugar at the end and spread on the finished cake.