It is being customary we bring a few authentic Russian chocolate bars/sweets to the US but we are always struggling whether we should check that "food" checkbox in the "Customs Declaration" form?
It is under the following entry in the form (yeah, together with insects, right):
I am (We are) bringing:
fruits, vegetables, plants, seeds, food, insects
I've been always checking it but that just gets us into more lines and triggers extra questions after getting to the baggage check.