On Friday, November 8, 2013 12:01:53 PM UTC+10, jmcquown wrote:
>
> I thought that's what brown sugar is... sugar with added molasses.

Some brown sugar is white sugar + molasses. Some brown sugar is "natural brown sugar", where the molasses hasn't been removed yet. In the added-molasses versions, sometimes the molasses isn't even cane molasses.

Quite a few traditional varieties of natural brown sugars are known by (and marketed under) traditional names, rather than as "brown sugar", but they're still brown sugars. (E.g., Demerara sugar, jaggery.)

(The UK and Australian substitute should be 1tbs treacle per cup.)