G'day,
Alex, it must be 45 years since some primary school teacher gave us the "twice cooked" origin of biscuit. I still walk down biscuit aisles in supermarkets muttering "twice cooked" to myself. Dammit!Isn't a cookie something you get from Mudcat? Otherwise it's something you hear about in American (U.S.) TV shows.
I'm also a Tim-Tam hater. The weather here is wrong, you get your fingers covered with sticky chocolate. They're also much too sickly sweet for me.
Cheers,
Alan