Macadamia Nuts!!!!

All about regulated inspections on import. Same thing for all non-pasteurized food products. They can be imported and sold if they go through the right regulatory process for inspection for pests, safety, etc. But you can't do that just by going through customs.

Watch out for the little dogs, often beagles, at baggage claim. That's where they get ya. Thankfully in the US, pleading ignorance usually gets you out of it with a lecture but unscathed.