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Yellow onions are most common. They store well.

White onions are usually sharper in flavor.

Red onions are somewhat mild in flavor. Their red skin adds color to dishes.

Sweet onions have a mild flavor even when raw. They don't store as long.

❁ Choose whole onions that are firm and heavy for their size, and have no scent. Look for a dry, papery outer skin. Avoid cut, bruised or sprouting onions.