Powdered sugar, also known as confectioners' sugar or icing sugar, is finely ground granulated sugar combined with a small amount of cornstarch to prevent clumping. It has a sweet, subtle flavor and a silky, powdery texture that dissolves quickly, making it ideal for delicate decorations and smooth glazes. Widely used in baking and confections across many cultures, powdered sugar is essential for frosting cakes, dusting pastries, and creating decorative sugarwork. Historically, its development in Europe in the 18th century revolutionized pastry decoration, and today it remains a staple in both home kitchens and professional pastry chefs worldwide.