12+ Royal Icing Sugar Cookie Decorating. You can definitely squeak by with a few tightly rolled parchment cones, but the far better option for cookie decorating is a disposable pastry bag fitted with a coupler and a superfine tip, such as a wilton #3. Royal icing is a sweet, hard, shiny icing that's made from egg whites and confectioners' sugar (also known as powdered sugar).
Begin by whisking the egg whites until foamy.
Decorating cutout sugar cookies with royal icing has become super fun for me. It's a fancy set of cookies that are surprisingly easy to create. I've used this knowledge and experience to change and tweak some of my methods and recipes. Then i realized it took over 24 hours to dry and harden.