Ice 2-layer cake smooth (bake two 2 1/2 in. layers for a 5 in. high cake). Pipe a 1 in. wide band of tip 16 stars at top and bottom edges of cake. On cake side bands, using a toothpick, mark triangle shapes 3/4 in. x 1/2 in. high. Fill in triangles with tip 16 stars. Attach icing decorations with dots of icing. Insert witch in cake top. Bake and cool cupcakes. Pipe tip 1M swirl on tops; position icing decorations and toppers.
*Note: Combine Orange with a little Red-Red for orange shown. Combine Leaf Green and Lemon Yellow for green shown.