-- FILLINGS can't always be used as FROSTINGS. There are reasons for this. Some of the choices above are not smooth (ex: Caramel Toffee Crunch contains 'chunks' of toffee) and some aren't stable enough to use as a frosting (ex: Lemon Curd is a homemade pudding... very soft and not stable). I can help you make decisions on what works best as a filling vs a frosting, so just ask.