Mix the butter and sugar until foamy, add the vanilla flavor and beat in with the egg. Mix flour with baking powder and salt and stir in; then fold in the hazelnuts and chocolate chips. (The dough is very lumpy - it is easiest to knead with your hands).
Line an ungreased baking sheet with parchment paper and use a teaspoon to put small heaps on top.
Bake in the preheated oven at 175 ° for about 20 minutes until the cookies have broken apart and are golden brown.
ATTENTION: Watch the last few minutes - the cookies burn very quickly.