I have brought over biscuits and Weetabix and other packaged treats from the UK to the US with no problem whatsoever...I did however face some probems with henna (they eventually let me have it) and plant material (twigs, apples, nutshells and other little sacred site memorabilia) which they confiscated.Glad they did not do a body search, that is all I got to say.
Peg