Chop 150 g cashew nuts and roast in a dry pan while turning until golden. Finely chop the chocolate.
Preheat the oven to 175 degrees.
Mix the butter, sugar, vanilla sugar and salt with the hand mixer until the sugar has dissolved. Add the egg, mix the flour and baking powder and fold in together with the chopped seeds and chocolate.
With 2 teaspoons, place small heaps, not too close together, on a baking sheet lined with baking paper, place one of the whole kernels in the middle and bake for about 12 minutes. Only when they have cooled down completely remove the biscuits from the baking paper.