medium-sized yellow-skinned onion
Yellow onions are a good source of vitamin C, fiber, and quercetin, a flavonoid antioxidant; they are also low in calories (approximately 40 calories per 100 grams) and contain prebiotic compounds that support digestive health.
About
The yellow onion (Allium cepa L.) is a bulbous vegetable belonging to the Amaryllidaceae family, native to Central Asia but now cultivated worldwide. Medium-sized specimens typically weigh 100–200 grams and feature a golden-brown, papery outer skin (tunic) that encloses concentric layers of pale yellow-white fleshy scales. The flavor profile is pungent when raw, owing to volatile sulfur compounds, but becomes sweet and mellow when cooked as these compounds break down and natural sugars caramelize. Yellow onions are the most versatile and widely cultivated onion variety, prized for their balanced sweetness and ability to develop complex flavors through various cooking methods.
Culinary Uses
Yellow onions serve as a foundational aromatic in countless cuisines, used raw in salads, salsas, and sandwiches, or cooked in soups, stews, sauces, and braises. They are essential to French mirepoix, Spanish sofrito, Italian battuto, and Indian tadka preparations. Caramelization—a slow cooking process that concentrates natural sugars—produces deep umami notes ideal for French onion soup, gravies, and burgers. The medium size makes yellow onions practical for both home and professional kitchens, suitable for dicing into uniform pieces for stocks and sauces or slicing thinly for raw applications. Their assertive flavor mellows considerably with cooking, making them excellent for developing flavor bases before adding other ingredients.