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Vodka is made by the process of distillation of a fermented substance--often potatoes and rye or wheat grain--and less often, sugar beet molasses. Most vodka was traditionally made from potatoes and corn, but in recent years, most high-quality brands of vodka has been distilled from cereal grains.
One primary difference is that whiskey is aged in wooden barrels. Vodka, by tradition, is bottled straight from distillation.Another difference is that vodka need not come from grain. Vodka can be distilled from potatoes or even molasses, though traditional vodka is not supposed to come from molasses.odka, by tradition, is bottled straight from distillation. Another difference is that vodka need not come from grain. Vodka can be distilled from potatoes or even molasses, though traditional vodka is not supposed to come from molasses.