Mix the butter with the powdered sugar, vanilla sugar and salt until frothy. Mix the cornstarch with the flour and sieve. Add spoon-wise to the butter mixture and stir in well.
Shape the dough into rolls and cut off hazelnut-sized pieces. Shape it into a round shape in your hand and place it on a non-greased tray. Immediately press it once with a fork dipped in flour and tapped again, so that the balls become a little flat and get a nice pattern.
Bake in the oven preheated to 160 ° C for about 10-15 minutes. They should stay very bright.
Remove from the tray while it is still warm.
Annotation:
You can of course also put them on baking paper and bake them.