3 1/2 cups Powdered sugar directly out of the box or the plastic bag weighs 4 1/2 ounces per cup, thus a 1-pound package (or 16 ounces) contains around 3 1/2 cups of powdered sugar.
Are confectioners’ sugar and powdered sugar the same?
Yes! Powdered sugar, confectioners’ sugar (including confectioners’ sugar and confectioners’ sugar), icing sugar, and 10X (a reference to particle size) are same.