A friend has asked if I can try to come up with some cookies for her son's birthday that at least look like things other kids have at their parties, because with his egg, dairy and nut allergies, he never gets a regular old birthday cake. I have been looking at various recipes and usually like Lila Loa's vanilla sugar cookie recipe because it doesn't spread. Was planning to use that recipe and substitute vegan margarine for the butter, but am not sure about what to substitute for the eggs. Suggestions I've been given are soy flour and also apple sauce. From what I have read, what one uses to substitute should be based on the purpose of the egg in the original recipe, but I am not sure whether the egg is for moisture or something else in this recipe. Anyone have any insight about substitutions or a recipe that has already been tried that I could use? Also, I have never used vegan margarine, so I wonder if it will cause them to spread or make other changes I'm not thinking of.
I typically use Royal Icing, but will be doing a glaze, using water instead of milk (have done that before with no problems) and plan to do a baseball themed set for him. All suggestions and help are most welcomed. Thanks!