in a deep bowl, mix one cup of sugar, half a pack of softened butter and five raw egg yolks. Add 1 tablespoon of vanilla sugar, pinch of salt and the zest of half a lemon. All mix well and gradually add the flour — a total of one and a half cups. If necessary, increase the amount of flour: the dough should have a fairly dense. Put it on a baking sheet, roll out thinly and send in a preheated 180 degree oven for 25 minutes. Mazurek Remove from the oven and brush with a mixture of hot berry jam and any nuts to taste. Reduce the oven temperature to 170 C and bake the cookies for 10 minutes. Not cooling the, cut ready Mazurek on large squares.