Granulated, Brown, or Powdered Sugar?
If your recipe simply calls for sugar, use white granulated sugar. Powdered sugar, or confectioner's sugar, refers to granulated sugar that has been pulverized; cornstarch is often added to powdered sugar to prevent clumping. If your recipe requires brown sugar, it will be noted as such. Brown sugar is a mix of granulated sugar and molasses; the amount of molasses determines whether the sugar is classified as light or dark.
Store Your Sugar
Boxed or bagged sugar needs to be transfered to a sealed plastic bag or airtight container to avoid hardening. When sugars are stored in a cool, dry place, they will keep indefinitely.