g/2oz cup caster sugar

Caster sugar, also known as superfine sugar or castor sugar, is a refined granulated sugar with crystals finer than standard granulated sugar but coarser than powdered sugar. Produced through the crystallization and processing of sugarcane or sugar beet juice, caster sugar undergoes additional milling to achieve its characteristic fine particle size, typically between 0.3 and 0.6 millimeters in diameter. This refinement gives the sugar superior dissolving properties and a more uniform texture compared to standard granulated sugar. The ingredient is chemically identical to other sucrose-based sugars, consisting of 99.8% pure sucrose by weight.

Caster sugar is the preferred sweetener for baking, particularly in British and Commonwealth cuisines, where it dissolves rapidly into batters, meringues, and custards without the grittiness associated with coarse granulated sugar. It is essential for meringues, mousse, and whipped cream preparations where quick dissolution and smooth texture are paramount. In beverage applications, caster sugar dissolves instantly in cold drinks, making it ideal for iced tea and cocktails. It is also used in dusting desserts and as a topping for baked goods due to its fine crystal structure.