I just sent a care package over to mate in Japan filled with chips, lollies, peanut butter and tomato sauce - no problems with customs at all because they were all in their original wrappers/packaging.

I received a fair bit of NZ chocolate when I was in the US as well in care packages, so it's fine for us Kiwis to send out chocolate (again as long as it's in it's original packaging). I'm sure it wouldn't be a problem to send out choccies from other countries either - would pay to check with the post office first.