This time of year, chocolate gelt is pretty easy to come by. However, it isn't the greatest thing to decorate cupcakes with, and folks who are allergic to chocolate need to give it a miss. For an alternative, try piping gelt with royal icing. You'll need stiff consistency royal icing in yellow, round tips #12 and #2, a flower nail, parchment paper squares, a glue stick, a Styrofoam block to rest the nail in, and a dusting pouch filled with a 50/50 mix of powdered sugar and cornstarch. Start by sticking a parchment square to the flower nail with a dab from the glue stick .