@Julia M. Usher posted:
It sounds like @Econlady's (Kate's) suggestion of doing PYO cookies may be your best bet then - have them color in a stenciled design with either edible marker or food colorings. Though I know others ship icing with some degree of success. Perhaps your icing recipe is less stable than others?
Yes, I know other ship icing and thats the reason I am asking if there is some trick. But I assume they use some other mixture instead of royal icing.