Food & Cooking Recipes Dessert & Treats Recipes Royal Icing 3.2 (428) 18 Reviews By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on February 9, 2021 Print Rate It Share Share Tweet Pin Email Yield: Makes about 2 1/2 cups This is our go-to recipe for royal icing. We use it for decorating cookies and cakes. To make it especially glossy, mix in a three drops of glycerin (available at drugstores). Ingredients 2 large egg whites, or more to thin icing 4 cups sifted confectioners' sugar, or more to thicken icing 2-4 teaspoons fresh lemon juice Directions Beat the whites until stiff but not dry. Add sugar, lemon juice and glycerin (if using); beat for 1 minute more. If icing is too thick, add more egg whites; if it is too thin, add more sugar. The icing may be stored in an airtight container in the refrigerator for up to 3 days. Johnny Miller Cook's Notes You can substitute 5 tablespoons meringue powder and 1/3 cup water for raw eggs. Raw eggs should not be used in food prepared for pregnant women, babies, young children, or anyone whose health is compromised. Rate it Print