All kinds of good info about all things customs related at cbp.gov

Current exemption for non-citizens bringing gifts is $100 according to their site - if the cookies, two prints, and anything else you're leaving behind is under a hundred bucks, best to declare both prints even though you're taking one home.

Reason being, on the off chance you get an agent who is curious and wants to see the print, and they then discover you have two - it could cause more questions.