Can I use oil to make linzer cookies instead of using butter?

Don’t expect the Linzers to have the rich flavor that those with butter would have. If you can’t use butter, I’d look for a cookie that doesn’t call for it. Many Italian recipes for biscotti don’t use butter, and there are a number of other cookies from the Mediterranean that would also work for you.

unfortunately, that i'm not sure of as use butter when needed and haven't substituted.

should not be a problem. use a vegetable oil. the cookie may not be as crumbly as a traditional linzer torte cookie made with butter. happy holidays.