A breakfast cupcake is one that is sweet enough to be tasty, but hardy enough to serve as a quick and easy breakfast. There is no better way to start off your day than with a peanut butter and jelly cupcake, right? These are made from flour, salt, baking powder, peanut butter, an egg, sugar and milk. The jelly is where the frosting comes in – it is made of a simple combination of jelly and cream cheese. This flavor combination should win over everyone, from kids to adults.