What is caster shuger?

Caster sugar, also known as superfine sugar, is a finely granulated sugar that dissolves quickly and easily, making it ideal for baking and beverages. Its texture is between granulated sugar and powdered sugar, allowing it to blend smoothly into recipes like cakes, meringues, and cocktails. Caster sugar is commonly used in recipes that require a light and airy texture, such as mousses and whipped creams. It is often available in grocery stores or can be made at home by processing granulated sugar in a food processor until finely ground.