I made 9 *LARGE* cupcakes this afternoon for use on Easter. I needed to make em now since I have no clue how the next few weeks will be going job wise etc. So now I need to freeze them. Will I have to thaw them completely before decorating them? Or can I frost/decorate them with Buttercream with them still frozen? If I do will the frosting then get icky or even fall off as they thaw? TIA!