g/8oz caster sugar

Caster sugar, also known as superfine sugar or castor sugar, is a refined granulated sugar with an exceptionally fine crystal structure. Produced from sugarcane or sugar beets through crystallization and mechanical sieving, caster sugar represents a finer grade than standard granulated sugar but coarser than powdered/icing sugar. The crystals measure approximately 0.3-0.5 mm, allowing for rapid dissolution and uniform distribution in batters, doughs, and beverages. Its fine texture and high purity (99.9% sucrose) make it the preferred sugar for baking, meringues, and delicate applications where crystal size matters.

Caster sugar is predominantly white, though golden and muscovado varieties exist with different molasses contents and flavor profiles. The refining process removes impurities and colorants, resulting in a clean, neutral sweetness without competing flavors. In the United States and some other markets, this ingredient is marketed as "superfine" or "bar" sugar.

Caster sugar is essential in baking and confectionery, particularly for applications requiring quick dissolution and smooth texture. It is the standard sweetener for meringues, mousses, and whipped desserts where fine crystals incorporate air and dissolve without grittiness. In beverages, caster sugar dissolves instantly in cold liquids, making it ideal for iced drinks, cocktails, and cold infusions. It is also commonly used in cake batters, cookies, pastry creams, and dusted over finished baked goods for decoration. Professional pastry chefs and home bakers alike prefer caster sugar for its consistent performance and refined mouthfeel compared to coarser granulated sugars.