Work the butter and grated cheese together well, add the cream and spices. Knead together with baking powder and flour to form a dough.
Splash the cookies on a parchment-lined baking sheet. Brush with egg yolk and top with caraway seeds, cheese or other spicy things. Bake on the middle shelf in the preheated oven at approx. 200 ° top / bottom heat for about 10-13 minutes until golden brown.