yellow or white onion
Onions are good sources of vitamin C, dietary fiber, and the prebiotic compound inulin; they also contain quercetin and other polyphenolic antioxidants with potential anti-inflammatory properties.
About
Onions (Allium cepa L.) are bulbous vegetables belonging to the allium family, which also includes garlic and leeks. Yellow and white onions are cultivated varieties that differ primarily in papery outer skin color and subtle flavor characteristics. Yellow onions have copper-bronze outer layers and are the most widely cultivated type, with a higher sugar content and assertive, complex flavor that sweetens considerably when cooked. White onions feature silvery-white outer papery skin and white flesh; they are slightly milder than yellow varieties with a crisper, more delicate texture and are often preferred raw. Both types possess layers of crisp, juicy flesh surrounding a central core and release pungent sulfur compounds when cut due to the enzyme alliinase.
Culinary Uses
Yellow and white onions are foundational ingredients across global cuisines. Yellow onions are the workhorse for caramelizing, sautéing, and building depth in stocks, soups, stews, and sauces; their sweetness intensifies with slow cooking. White onions are traditionally favored in fresh applications—sliced raw for salads, salsas, and ceviche, or grilled and roasted—though they also perform well in cooked dishes. Both are essential in mirepoix (France), soffritto (Italy), and similar aromatics foundations. They pair with virtually all proteins, vegetables, and grains, and are equally suited to savory and subtly sweet applications.