How about some Rat-Infested Cupcakes?
Ewwww....and kind of cool...
Your favorite cupcakes
Cupcake picks (optional)
Toy rats (can be found in the Halloween section of most stores)
Quicky frost cupcakes and add sprinkles if desired. Using a fork, pick out a piece from the top and add a toy rat to look like it's nibbling the cupcake.