Raisins are grapes that are either sundried or dried mechanically.

 The most common grapes used for raisins are Thompson seedless, Zante and Muscat. Thompson seedless grapes can be used to make either dark or golden raisins. Dark raisins are sun-dried for several weeks, producing a shriveled appearance and deep color; while golden raisins are treated with sulphur dioxide (a preservative) and dried with artificial heat, to produce a moister, plumper raisin.

Because raisins have a high natural sugar content, they should be consumed in moderation.

Store raisins in a sealed container at room temperature for several months. Refreigerate raisins for up to a year.