Sweet onions are a type of onion known for their mild flavor and high sugar content. They are typically larger and have a lighter color compared to regular onions. Common varieties include Vidalia, Walla Walla, and Maui onions, each named after their specific growing regions. These onions are often used in salads, sandwiches, and various dishes where a less pungent onion flavor is desired. The sweetness of these onions comes from their low sulfur content, which makes them less sharp and more palatable. They can be eaten raw or cooked, and their natural sweetness enhances the taste of many recipes. Sweet onions are usually available in the spring and summer months, making them a seasonal favorite.