You might have seen me use Edible ink markers in my cookie decorating tutorials. They look a lot like magic markers, but they are filled with food coloring and they work great on royal icing. Here are just some of the cookies that these markers have
Royal icing tips and tricks. 1 cup powder sugar (confectioners sugar) 1 tablespoon milk 1 tablespoon light corn syrup 1 drop lemon juice (can be fresh) This will outline and fill approximately one dozen cookies in one color.