Can challah be given as a gift to a non-Jew? For instance, if one were to make too much challah Friday morning, would it be acceptable to give a loaf away to a Christian family?
(There is theoretical challah, i.e. the small portion taken off when making lots of bread which was given to the kohen back in the day, that's a different story.)
You mean the traditional braided bread? It's just bread. Yes, you can give it to anyone for any purpose.
There is the custom to eat braided bread on Shabbat, but braided bread is just bread.