Glossy Royal Icing
I received this recipe from a professional baker. I prefer to use this instead of a regular royal icing recipe with egg whites. It hardens nicely and is glossy rather than matte like regular royal icing. Use almond, orange, or lemon extract, whatever you prefer.
For thick icing, which you will need for outlining and details, add more sugar until icing is quite thick. Icing can be thinned with a few drops of water to make a glaze for filling in outlines or dipping cookies.
Icing hardens into a shiny glaze quickly. Keep stirring your bowl of icing as you work with it.