The cookies' dough is made from a fine mixture of flour, cornstarch, butter or margarine and egg yolks which is baked in the oven. After the cookies are ready, and left to cold slowly in room temperature, the powdered sugar is sprinkled upon the cookies, or put both powdered sugar and cookies in a plastic bag, and shaked to distribute the sugar evenly on cookies' surface. Then the cookies are kept in a tight jar.