For frosting, add milk to dry pudding mix in medium bowl. Beat with whisk 2 minutes or until well blended. Gently stir in whipped topping. Remove 1 cup of the pudding mixture to use for the hair; spread remaining pudding mixture onto cake.
Evil Embellishments-Scary Face
For scary face and witch's wart, use the chocolate chunks.
Evil Embellishments-Ghoulish Green Hair and Witch's Hat
For ghoulish green hair, stir green food coloring into the reserved 1 cup pudding mixture. Spread onto the head as desired. For witch's hat, decorate with the cookies.