Golden Caster Natural Unrefined Cane Sugar. Bakingmad. Our Baking Mad experts are here to help you make the most of your home baking. Our unrefined natural sugar has been very carefully produced to lock in, rather than refine out, the natural molasses of the sugar cane. It is this difference which gives Billington's sugar its unique richness, depth of flavour and natural colour. An everyday, versatile sugar perfect for all sorts of baking from delicious sponge cakes to crunchy biscuits