c. powdered sugar

Powdered sugar, also known as confectioners' sugar or icing sugar, is a refined sweetener produced by grinding granulated cane or beet sugar into an extremely fine powder and combining it with a small amount of cornstarch (typically 3-5%) to prevent clumping and maintain flowability. The cornstarch acts as an anti-caking agent, absorbing moisture that would otherwise cause the sugar particles to aggregate. The result is a white, talc-like powder with a subtle sweetness and neutral flavor profile. This ingredient derives from the same sugar crops (Saccharum officinarum or Beta vulgaris) as granulated sugar but undergoes additional mechanical processing to achieve its characteristic ultrafine texture.

Powdered sugar is essential in baking and pastry work, particularly for dusting finished desserts, creating smooth frostings and glazes, and making fondants and royal icing. Its fine particle size dissolves quickly in liquids, making it ideal for icings that must be creamy and lump-free. It is widely used in American, European, and Asian confectionery traditions for decorating cakes, cookies, donuts, and pastries. The ingredient's quick dissolution also makes it useful in whipped cream toppings and mousse preparations. Unlike granulated sugar, powdered sugar should not be used in applications requiring crystalline texture or where granulated structure is desirable, as its cornstarch content alters baking chemistry in certain contexts.