Edible Paper
Frosting sheets are also known as edible paper or icing Frosting sheets. They are the substrate that you print to with edible inks for cake decorating purposes. Frosting sheets are backed with plastic so that they slide through your printer in much the same way that normal paper does, and they get printed to with edible ink. Then the plastic backing is removed, and the Frosting sheets aka icing sheet is applied to a layer of Frosting on top of the cake.