Ingredients

　　7 1/2 teaspoons meringue powder

　　1/4 cup water

　　Put confectioners’ sugar, meringue powder, and water into the bowl of an electric mixer fitted with the whisk attachment; beat on low speed 10 minutes. Use immediately, or store in an airtight container up to 2 days (icing hardens quickly when exposed to air). Beat well with a rubber spatula before using.

　　Martha Stewart's Cookies