Raisin Fruit Drinks - A Raisin is a sun-dried or artificially dried grape, used in cooking and baking. Raisins are extremely sweet due to their high sugar content, and if they are stored for a long period the sugar crystallises inside the fruit. This makes the fruit gritty, but does not affect the usability. To decrystalise raisins, they can be soaked in liquid (alcohol, fruit juice or boiling water) for a short period, dissolving the sugar.