When using Global Entry to clear US customs, one of the four questions is (not verbatim) "do you have food?". I think it gives examples of fruits, meats, cheese, etc. which to me sound like unprocessed/raw foods.
However, I've read reports on the Internet of people getting chewed out or even kicked out of GE for failing to declare things that we would call food, such as potato chips, chocolate bars, sweets, and various other processed/mass-produced foods.
I've also read about people getting chewed out for declaring such food items and told that they are "wasting time" by doing so.
Is there an authoritative guide somewhere that defines these terms? I'm probably going to err cautiously and declare my bag of chips as food, but if there's a firm regulation or something that clears me, great.