Stamping Ink White 18 ML (0.6 fl. oz.), by Stamp a Cake, is an edible ink and is certified food safe. This edible ink is used by placing a small amount of white ink into the roller tray, adding a small amount of gel color to achieve the desired ink color of your choice, then by coating the roller and rolling the ink onto the stamp design of your choice. Once applied to the stamp, gently press the stamp onto your fondant covered cake, cookie, or cupcake.