#2. Caster sugar and confectioners sugar
Caster sugar is superfine granulated white sugar. Because the crystals are so fine, they dissolve much quicker than standard granulated, which makes it ideal for making meringues, syrups, and cocktails. Also referred to as powdered sugar and 10x sugar, this is a type of white sugar that has been ground into a fine powder. To prevent clumping, a small amount of cornstarch is typically blended in. Confectioners sugar easily dissolves in liquid, and is ideal for making icing and frosting, as well as decorating baked goods.