200g soft butter
250ml sour cream
4 egg yolks
Preheat oven at 200C.
Stir butter, sugar and flour and mix in the sour cream and 3 egg yolks.
Let the dough rest on a cool spot for 1 hour.
Roll out dough, cut out circles, hearts, moons, place them on a greased baking sheet and brush them with egg yolk.
Bake them at 200C for 8 - 10 minutes.