chris - from rancho santa fe, CA
Royal icing is not supposed to dry shiny, and increasing the egg whites in your recipe will just make the consistency of your icing looser.
Color Flow Icing is similar to royal icing, except it dries shiny. Use it in place of royal icing on cookies and other projects where you want a shiny finish. Color Flow Icing drys completely, just like royal icing.
You can find the recipe here: http://bakedecoratecelebrate.com/recipes/colorflowicing.cfm