First stir the butter, sugar and egg whites until smooth. Then add the finely chopped or grated ginger and mix everything well. Then add the coarsely chopped chocolate, flour and grated nuts and stir everything well.
Line a baking sheet with parchment paper, spread the dough with 2 teaspoons on it (attention: the cookies rise extremely, so keep a lot of distance!) Bake at 180 ° C for about 10 minutes until golden.