For the dough, stir the softened butter, sugar and egg yolks very well until frothy. Then sieve the flour over it, knead and roll out on a baking sheet lined with baking paper. Brush with the jam.
For the topping, beat the egg whites until stiff and pour in the sugar. Then fold in the nuts and chocolate and spread on the dough. Bake at 180 ° C for about 25 minutes.
Tip: Instead of currant jam, plum jam also tastes very tasty!