Bake and cool the cupcakes in Halloween Themed Baking Cups, and cool completely on Cooling Grid.
Prepare Buttercream Icing recipe. Tint Lemon Yellow and Golden Yellow for yellow shade shown. Tint orange and Violet. Prepare Chocolate Buttercream Icing recipe. Tint black.
Using Lemon Yellow and Golden Yellow combination buttercream icing, ice top of cupcake with spatula.
To make spider web, use tip 4 and black icing top pipe 4 lines that intersect at the center of the cupcake to form 8 sections. Use tip 3 and black icing to connect segments with curved lines. Use tip 5 and violet icing to print "BOO" on cupcake. Use tip 3 and orange icing to overpipe "BOO" on violet icing.