Caster sugar is a finely granulated sugar that dissolves quickly, making it ideal for baking and sweetening beverages. Its texture is between regular granulated sugar and powdered sugar, allowing it to blend smoothly into recipes without leaving a gritty texture. This type of sugar is commonly used in recipes for meringues, cakes, and cookies, where a light and airy texture is desired. Caster sugar can be easily made at home by processing regular granulated sugar in a food processor for a few seconds, but care should be taken not to turn it into powdered sugar.