cookie is generic for biscuit in the US right?
ok so UK biccies,
Bourbon's - 2 choc rectangles filled with a choc cream - nomnomnom had some for breakfast (oops!)
Millies Cookies - lovely chewy cookies that you choose, and i always end up buying 6 and not 3....
Timtams - so much better than the UK type, called Penguins,
and finally, Oreos, nomnomnomnomnom