I am new to cooking. This year I am attempting to bake cookies. Some of the cookies I am making are gingerbread and sugar. I was looking up royal icing recipes to frost them with. My problem is I have found two different types of recipes ones that call for egg whites and ones without. With some warnings about uncooked eggs. Well young children & elderly will be eating my cookies (well if they turn out well & i don't burn my house down lol) Is it ok to use egg whites or should I be worried? Thanks!