Castor sugar

[Mary Ann]

Castor sugar is a fine granular sugar used mostly for baking.  It's 
readily available in the UK, but when I was back in Canada a few years 
ago I was unable to find an equivalent.  I used regular granulated 
sugar for baking but the difference between the two sugars was 
noticable.  It may be available somewhere in the US, but I was living 
just outside Toronto, with plenty of access to well-stocked grocery 
stores.  I never thought to check The British Shop, though (I'd go 
there to buy packets of Quavers, Galaxy chocolate tins of mushy 
peas...yum!).

Mary Ann, who enjoys her sugar as unrefined as can be (stop sniggering 
in the back!)