Caster sugar is a finely granulated sugar that dissolves quickly, making it ideal for baking and sweetening beverages. Its texture is smoother than regular granulated sugar, allowing it to blend seamlessly into recipes, especially in delicate desserts like meringues and cakes. This type of sugar is commonly used in the United Kingdom and is often referred to as superfine sugar in the United States. Caster sugar can be easily made at home by processing regular granulated sugar in a food processor for a few seconds, creating a similar fine texture suitable for various culinary applications.