Oh wise tribe... My family is spending a week in Thailand end of March. We're coming from Singapore. Do you know if I can bring in some unopened UHT milk and home baked breakfast biscuits? My toddler is very challenging to feed and these are the only things he'll eat for breakfast; without these he gets terribly sore tummy aches. As a New Zealander, I'd never dream of packing any food whatsoever, but thought I'd ask in case it's ok? Would make things so much easier!
TLDR : Answer Summary
Travelers can generally bring unopened UHT milk and home baked biscuits into Thailand without encountering issues, as long as they are in reasonable amounts and packed in hold luggage. Thai customs appear to focus more on strict regulations for fruits, vegetables, and meats rather than snacks and packaged foods. UHT milk is widely available in Thailand, making it an easy alternative if necessary.