Chocolate Pinwheel CookiesIngredients: 1 cup butter 1 cup sugar 2 egg yolks 4 teaspoons vanilla 2 tablespoons milk 3 cups flour 1 tablespoon baking powder 6 tablespoons cocoa mixed with 2 tablespoons melted butter and 2 tablespoons milk. Bake at 163°C for 15 to 20 minutes