Caster sugar, also known as castor sugar, superfine sugar, or baking sugar, is a type of granulated sugar that has been ground to a finer texture than regular granulated sugar but is not as fine as powdered (confectioners') sugar
. Its crystals are smaller, allowing it to dissolve more quickly and evenly, which is especially useful in baking and making delicate desserts like meringues, mousses, and sponge cakes
. Unlike powdered sugar, caster sugar contains no additives such as cornstarch, so it doesn't affect the texture of recipes beyond sweetness and smoothness
. It is prized for its ability to dissolve rapidly without heat or extensive mixing, making it ideal for creaming with butter, incorporating into doughs, puddings, glazes, and syrups
. There are two main varieties: white caster sugar, which is the most common, and golden caster sugar, which retains some molasses and has a light brown color and subtle caramel flavor
. If caster sugar is not available, it can be made at home by pulsing regular granulated sugar in a blender until it reaches a fine but not powdery texture
. Nutritionally, caster sugar is similar to regular sugar, providing about 16 calories per teaspoon and containing no fat, protein, or fiber
. In summary, caster sugar is a finely ground sugar with a texture between granulated and powdered sugar, valued for its quick-dissolving properties that enhance texture and consistency in baking and cooking
