Meringue Powder is a pasteurized egg product used for icings and meringues. Meringue powder contains modified food starch, egg whites, sugar, gum arabic, calcium sulfate, citricacid, cream of tartar, silicon dioxide and artificial vanilla flavoring. Egg white powder is just that: dried egg whites. Both can be used to substitute for fresh egg whites in recipes. Meringue powder is gluten free, safe from salmonella, and some brands are certified kosher. Meringue powder has a long shelf life (up to two years), as long as it's kept dry and not contaminated by dipping a wet or used spoon into it. Several different icings can be made using Meringue Powder: Royal Icing dries hard to make long lasting decorations. Royal icing items should be air-dried. Avoid freezing. Fluffy Boiled Icing is a glossy, smooth frosting that forms a crust, but remains soft inside (similar to 7 minute icing). Flowers with thin fragile petals do not work well using this icing. Snow White Buttercream Icing is also made with Meringue Powder. Flowers can be air dried. When air-dried, they have a translucent look. Thin-petaled, fragile flowers cannot be made using this icing because it is not as strong as royal icing. Meringue powder can also be used in place of raw egg whites in pies, cakes, pavlovas, or to make mushrooms for a Buche de Noel.