Yes. Confectioners sugar is made by finely grinding regular sugar until it becomes a powder.
Sucrose
Confectioners sugar (also called Powdered sugar) differs from "regular sugar" (Granulated sugar) in two ways. Confectioners sugar it's milled to a much finer grain and, and it has cornstarch in it to prevent caking. If you run of of Granulated sugar, you can substitute with Confectioners sugar. Multiply the amount of granulated sugar needed by 1.75. It takes 1 3/4 cup of powdered sugar to substitute for 1 cup of granulated sugar.
Confectioners sugar and powdered sugar are the same, so yes, you are using the same thing regardless of what the recipe calls for.
The 4X just refers to how finely the sugar has been ground. For example 10X sugar is powdered or confectioners sugar. The larger the number the finer the grind.
Different names for the same thing.
Um, yes. Confectioners sugar is the same thing as powdered sugar - just a different name.
Confectioners sugar
three and a half cups three and a half cups
Yes
The main distinguishing feature of confectioners' sugar is that its a very fine powder (while regular sugar is often in powder form, it is more granular, hence the name granulated). This helps the confectioners' sugar dissolve faster, which may aid in some applications.
Yes, its the same thing. Although a bag of confectioner's sugar may have more than a box does, it's still the same!
Yes, if you put it in a food processor for a few minutes