medium-sized red onions
Red onions are rich in quercetin and other antioxidant flavonoids, particularly concentrated in the outer layers. They provide fiber, vitamin C, and compounds with anti-inflammatory properties; the anthocyanin pigments intensify these benefits compared to yellow or white varieties.
About
Red onions (Allium cepa var. rubrum) are a cultivated variety of the common onion, characterized by their deep burgundy-red papery skin and purplish-red layered flesh. Native to Central Asia and domesticated millennia ago, red onions are medium-sized bulbs typically 2–3 inches in diameter. They possess a milder, slightly sweeter flavor profile than yellow onions, with a more pronounced sulfur compound content that becomes mellower when cooked. The anthocyanin pigments responsible for their color contribute both visual appeal and antioxidant properties. Medium-sized specimens offer optimal balance between skin-to-flesh ratio and ease of preparation.
Culinary Uses
Red onions are valued for both raw and cooked applications across global cuisines. Raw, they provide crisp texture and peppery sweetness to salads, salsas, ceviche, and garnishes, particularly in Mediterranean, Latin American, and South Asian cooking. When cooked, their sugars caramelize, yielding deep sweetness suitable for soups, stews, braises, and French onion soup. The vibrant color intensifies when pickled, making red onions essential for quick pickles and condiments. Their milder flavor complements grilled meats and vegetables without overpowering delicate ingredients.