Preserving Sugar is a pure refined sugar with large white crystals or irregular small lumps for making jams and marmalades. Use it for jammy, pectin-packed things. Preserving sugar is ideal for making jams, preserves and marmalades with fruits containing higher levels of pectins.
You don't really need preserving sugar, as granulated or caster sugar do the trick. But it is more convenient because it doesn't clump into one big mass and so needs less stirring, plus it is less likely to burn.
- Christian, G. (2005) Real Flavours: the handbook of gourmet & deli ingredients, Grub Street. ISBN: 1904943209.
- Stobart, T. (1981) The Cook's Encyclopedia: ingredients & processes, Harper & Row. ISBN: 0060141271.