What is "icing sugar"?

Icing sugar, also known as powdered sugar or confectioner's sugar, is a finely ground sugar that has been processed into a powdery consistency. It is commonly used in baking and dessert making to create smooth, creamy icings, frostings, and glazes. Icing sugar dissolves easily and combines smoothly with other ingredients, resulting in a velvety texture ideal for decorating cakes, cookies, and pastries. It is also commonly dusted over desserts like donuts, cookies, and fruit to add a sweet finishing touch.