How Icing Sugar Improves Texture in Pastries and Cakes Icing sugar—also known as powdered sugar or confectioners’ sugar—is an essential ingredient in baking. Whether you’re making soft cakes, fluffy pastries, buttercream frosting, or sweet glazes, icing sugar plays a significant role in enhancing texture, structure, and mouthfeel. In this blog, you’ll learn how icing sugar…