© Denzil Green
Spanish Onions are large, sweet, mild onions that always seem to have just the right taste, and yield slices just the right size, for hamburgers.
They are generally milder than regular white or yellow onions, though occasionally you will bite into a more pungent one (it depends on how much sulphur was in the soil where they grew.) The skin can be white or yellow.
Spanish onions need 12 hour plus days for bulb formation. When they flower, they produce flowers that are whitish-yellow.
Some people confuse Spanish Onions with Bermuda onions. Bermuda are sweeter and have a somewhat flattened top; Spanish are a bit sharper, and are generally pretty much round.
Spanish onions are often eaten raw. They are very juicy, because they are almost 95% water when harvested. Nevertheless, they stand up well to cooking.