size onions

ProduceYear-round; peak harvest occurs in late summer and early fall (August-October in Northern Hemisphere), with storage extending availability through winter months.

Low in calories but rich in vitamin C, B vitamins, and sulfur compounds with potential anti-inflammatory properties. Onions also contain quercetin, a polyphenolic antioxidant.

About

The onion (Allium cepa) is a bulbous perennial plant from the Amaryllidaceae family, native to Central Asia and domesticated for thousands of years. Onions are characterized by concentric layers of fleshy scales beneath a papery outer skin, with colors ranging from white to yellow, red, or purple depending on variety. The flavor profile varies from mild and sweet when raw to deeply caramelized and savory when cooked; pungency derives from volatile sulfur compounds that are released when the bulb is cut or heated.

Culinary Uses

Onions are a foundational aromatics ingredient in countless cuisines worldwide, functioning as a flavor base in soups, stews, braises, and sauces. They are commonly diced and sautéed to develop sweetness and depth, caramelized for complex umami notes, or sliced thin for use in salads and as a raw condiment. Different varieties suit different applications: yellow onions for cooking, sweet varieties like Vidalia for raw consumption, and red onions for pickling and salads. Onions can also be roasted whole, grilled, or deep-fried.

Forms & Preparations

Whole bulb — Unpeeled bulb for roasting whole, grilling, or storing; keeps for weeks in cool, dry conditions.
Diced — Cut into small cubes for sautéing and use as an aromatic base in soups, stews, and sauces.
Sliced — Cut into rings or half-moons for caramelizing, grilling, or serving raw in salads and slaws.
Minced — Very finely chopped for even distribution in dishes and to maximize surface area for cooking.
Caramelized — Slowly cooked with fat over low heat until deep golden-brown and sweet; used in gratins and as a condiment.
Powdered — Dehydrated and ground into fine powder; used as a seasoning in spice blends and rubs.

Substitutes

Unknown — Use in smaller quantities (1:3 to 1:4 ratio) for a more pungent result; better for cooked applications than raw use.
Unknown — Substitute at 1:1 ratio for a milder, slightly sweet character; excellent for dressings and light sauces.
Unknown — Use white and light green portions at 1:1 ratio for a more delicate onion flavor; requires slightly longer cooking.
Unknown — Use 2-3 times the quantity for comparable flavor impact; best as a raw finish or in quick-cooking applications.
Unknown — Combine with garlic to approximate onion's aromatic function, though the result lacks sweetness; use equal parts by weight.