Confectioners' sugar, also known as powdered sugar or icing sugar, is a finely ground sugar that is commonly used in baking and dessert-making. It is made by grinding granulated sugar into a fine powder and often includes a small amount of cornstarch to prevent clumping. This sugar dissolves quickly, making it ideal for frostings, glazes, and dusting over desserts. Due to its fine texture, confectioners' sugar is perfect for creating smooth and creamy icings, such as those used on cakes and pastries. It is also a key ingredient in many sweet recipes, including marzipan and buttercream frosting. Its versatility makes it a staple in many kitchens.