Only prepackaged food without nuts or meats basically.

And Mexico in general, rules apply at their will. So if you bring something within the rules and they like how it looks, they'll take it.

Any Mexico trip I have pack food up to but not including anything in Mexico.


What some crews do is just leave your food in the crew room in iah/lax for the Mexico overnight.


Oh, and what goes through one time isn't guaranteed to go through the next. I've seen far too many people get all their food taken.