Mix all the dry ingredients first. Sift flour, cocoa into a bowl, add sugar, salt and vanillin. Mix thoroughly until a uniform color. Add softened butter and egg.
Knead the dough. Divide the dough into small pieces.
Roll the balls. Mash each ball with your finger and put inward on the candy. Roll cookies, dip in powdered sugar. You don’t have to roll anything.
Bake at 180 degrees for 12 minutes. Have a warm.