medium-size purple onion
Purple onions are good sources of vitamin C, dietary fiber, and quercetin, a polyphenolic antioxidant concentrated in the pigmented outer layers. They are also relatively low in calories (approximately 40 per 100 grams) while providing prebiotic inulin that supports digestive health.
About
The purple onion (Allium cepa, variety red) is a cultivar of the common onion distinguished by its deep magenta to burgundy-colored papery outer skin and layered inner flesh that ranges from white to pale pink with purple striations. Medium-size specimens typically weigh 150-250 grams and offer a balanced ratio of surface area to inner layers, making them ideal for slicing and cooking. Purple onions possess a milder, slightly sweeter flavor profile compared to yellow onions, with subtle sulfurous notes that become more pronounced when raw but mellower when cooked. The color derives from anthocyanin pigments, water-soluble compounds that concentrate in the outer layers and gradually diminish toward the center.
Culinary Uses
Purple onions are valued in both raw and cooked applications across diverse culinary traditions. Raw, they appear prominently in Mexican salsas, Indian chutneys, Mediterranean salads, and Southeast Asian preparations, where their milder character and visual appeal enhance dishes without overwhelming other components. When cooked through caramelization, grilling, or roasting, they develop deeper sweetness and lose much of their pungency, making them excellent for French onion soup, grain bowls, stir-fries, and vegetable sides. Their natural sweetness makes them particularly suited to combination with acidic elements such as vinegar or citrus, and they pair well with spices common in Latin American and Indian cuisines.