What do we eat with our cups of tea?

I’ve just finished reading Mother Tongue by Bill Bryson, and loved it. BUT – at one point I think he’s mistaken about Australian English, which makes me wonder whether I can trust him on other matters.

To wit: “In Australia, people eat cookies, not biscuits”.

I eat biscuits. Always have. Definitely not cookies. But then I’m only second-generation Australian and I use lots of Scottish terms picked up from my mother: pants and vest rather than knickers/jocks and singlet; sweets rather then lollies; that sort of thing. So before metaphorically making nasty faces at Bryson I need to double-check with other Australians.
 
Do we eat biscuits or cookies?