Use this 20G of Mauve Concentrated Food Color Gel to add to your buttercream icing. This tube of food coloring allows you to have portion control to get the color you desire. This food coloring is water based ahnnd is not designed to be used for chocolate. However, it can be used in fudge that is not chocolate along with fondant, icing, hard candy and more. This product is Certified Kosher.