I wish you could smell my house right now as I've just baked another batch of these lovely chocolate brownies for the weekend.
I baked my first batch last week after coming across the recipe on Greenthumb's blog. They went down a treat and when I was choosing what to bake today my son asked for these again. If you'd like to try them yourself you'll find the recipe here.
I don't know if there's any difference between UK measuring cups and Australian ones, I followed the recipe to the letter using my UK bought cups and it's worked perfectly both times.