Where does icing sugar originate from?

Icing sugar, also known as powdered sugar or confectioners' sugar, is believed to have originated in Europe during the Middle Ages. It is made by finely grinding granulated sugar and mixing it with a small amount of anti-caking agent, such as cornstarch, to prevent clumping. While its exact origins are unclear, it became popular in the 18th and 19th centuries for decorating cakes and pastries. Today, it is widely used in baking and dessert-making around the world.