Caramelized onions are onions that have been cooked slowly over low heat for a long period, breaking down their natural sugars and resulting in a deep brown, sweet, and rich flavor.

"A Cook's Delight"
"A Cook's Delight"

Caramelized onions are onions that have been cooked slowly over low heat for a long period, breaking down their natural sugars and resulting in a deep brown, sweet, and rich flavor.