Preheat the oven to 180 degrees top / bottom heat. Beat soft butter with sugar, vanilla sugar and salt with a hand mixer. Stir in eggs one at a time. Mix the flour and baking powder, sieve over the egg and butter mixture and work in briefly. Crush and mix in the three types of chocolate.
Place 32 small heaps with 2 teaspoons on the baking sheet. Leave space in between because they will diverge during baking.
Bake in the preheated oven for about 15 minutes at 180 degrees. Let the cookies cool down a little before removing them from the baking sheet.