Preheat oven to 375 degrees F (190 degrees C).
Mix the All-Purpose Flour All-Purpose Flour (1 1/2 cup), Granulated Sugar (1/2 cup), Vanilla Extract (to taste) and Egg (1), into a dough. Divide the dough into two, and add Unsweetened Cocoa Powder (2 tablespoon) to one of the halves.
Flatten your white dough and cocoa dough on top of each other. Then roll the piece into a cylindrical log, and cut into small pieces.
Place your small pieces on a baking dish with some Butter (250 gram) and bake for 10 minutes in the preheated oven. When done, you are good to serve. Enjoy!