How to make Royal Icing

How to make Royal Icing  

 The traditional way to make Royal Icing is to beat egg whites and lemon juice together, adding the powdered sugar until the mixture holds stiff peaks. With modern concerns about salmonella from raw eggs, you can either use powdered egg whites or heat the egg whites first to kill any bacteria. With the heating method, mix the egg white and lemon juice with a third of the sugar, heat in a microwave until the mixture's temperature is 160°F.
coconut macaroons
Then remove from microwave, and beat in the remaining sugar until stiff peaks form. Using the powdered egg whites method, combine 1 Tbsp egg white powder with 2 Tbsp water. Proceed as you would otherwise. (Raw egg white alternatives from the 2006 Joy of Cooking)  If the icing is too runny, add more powdered sugar until you get the desired consistency. Fill a piping bag with the icing to pipe out into different shapes. (Or use a plastic sandwich bag, with the tip of one corner of the bag cut off.) Keep the icing covered while you work with it or it will dry out.