i'm looking to make something for april fool's day for my co-workers that is actually edible (and preferably tasty, too!). i don't want to trick them with spicy cupcakes or chocolate-covered bugs or anything; i'm thinking more along the lines of making them think it looks like one thing, but when they eat it, they taste something else. the first thing that comes to mind is a meatloaf cake with mashed potato frosting. any other ideas?!