In a bowl add 250g Butter then pour in 1 cup sugar, then 1 egg, flavour, cream it then add 3 And half cup flour, divide it into 2 then add cocoa powder to one, Place d dough on a leather and spread it, then put the other chocolate dough on top the normal vanilla dough, gently using the leather roll it and cut to your desired shape.

Bake for 10 to 15 minutes

Voila