I am making banana cupcakes with mocha frosting for a birthday, and thought to jazz things up a little with some filling for the cakes. My initial idea was to make a peanut butter filling, but the birthday girl in question isn't a fan of peanut butter. So I thought perhaps a caramel filling might work. Does anyone have any recipes or ideas for a caramel filling for cupcakes (short of sticking a Kraft caramel inside, which I don't want to do)? Thanks!