A highly refined sugar in impalpable powder, esp. suited to confectioners' uses.

Fine sugar with a little cornstarch added.

A powdered sugar that is best for recipes that will not be cooked. Best used in frostings or sprinkled on top of baked goods.

icing sugar

refined sugar ground into a fine, white, easily dissolved powder; also known as powdered sugar and 10X sugar.

This powdered sugar is best in recipes that will not be cooked at all, such as frostings, because it dissolves better than regular granulated sugar