Mix 65 g butter with 65 g sugar, 1 tablespoon vanilla sugar and 1 egg until frothy. Sieve 150 g flour over the mixture, mix with ½ teaspoon baking powder and stir in.
Put the dough on a greased baking sheet.
Spread 1 glass of apricot jam on top. Briefly bring 100 g butter, 100 g sugar and 1 tablespoon vanilla sugar to the boil and add the shaved hazelnuts. Spread this mixture on the apricot jam and bake for about 20 minutes at 180 ° C.
Cut into corners while still hot.
Finally, dip the two pointed corners in chocolate icing and let them dry on the baking sheet.