Perfect for that day when you remember about two hours too late that you promised to bring Halloween treats for the entire class, these cupcakes are incredibly quick and easy to make. How simple? Just pick up some pre-baked chocolate cupcakes and a tub of vanilla frosting, then use the old frosting-in-a-ziploc-bag-with-the-corner-cut-off trick to make an easy pastry bag. Squeeze the frosting out onto the cupcakes in fun and spooky designs ... and that's it! You're ready to party! Yum.