Juniper Green Icing Color Wilton This gel-based Wilton Juniper Green icing color gives you deep, rich color that won't change the consistency of your sweet treat. Perfect for coloring buttercream frosting, fondant, royal icing and more, this 1 oz. tub of green gel food coloring is highly concentrated, so a little goes a long way. Get a cool, dark green buttercream for a Christmas cake or a saturated, deep green for a striking birthday or wedding treat. Simply apply a small amount of food dye to your frosting or fondant using a toothpick, then mix to incorporate. Add more to deepen and darken the color. Also safe to use in batters, doughs and other foods, this edible green food dye is a great way to customize and personalize your treats.