Caster Sugar

Caster sugar is a fine-grained white granulated sugar with smaller crystals than standard table sugar. It dissolves quickly, making smooth syrups and airy meringues, and creams evenly into butter for tender cakes; the crystals feel like soft sand. Sold as refined white sugar, often labeled superfine in North America.\n\nThe term originated in Britain for sugar fine enough to shake from a caster and spread throughout Commonwealth baking and cocktail making. It is refined from cane or beet sugar and produced by sieving or controlled crystallization to achieve consistently small crystal size.