Wilton Royal Icing 1 Reviews By Anonymous recipe Comments | 2 Favorites | 217 Print This smooth, hard-drying icing is perfect for making decorations that last. It is also useful as a “cement” to fasten decorations together. Royal icing is edible, but not recommended for icing cakes. Wilton Royal Icing Ingredients 3 TablespoonsWilton Meringue Powder1 lb. (4 cups) confectioners’ sugar (aprox. 1lb.)6 Tablespoons warm water* Instructions Beat all ingredients until icing forms peaks (7-10 minutes at low speed with a heavy-duty mixer, 10-12 minutes at high speed with a hand-held mixer). Recipe makes 3 cups. NOTE: Keep all utensils completely grease-free for proper icing consistency. * For stiffer icing, use 1 tablespoon less water. **When using large countertop mixer or for stiffer icing, use 1 tablespoon less water.