purple onion

Purple onions (Allium cepa var. rubrum) are a cultivar of common onion distinguished by their deep red-purple outer skin and layered interior flesh that ranges from white to pale pink or lavender. Native to the eastern Mediterranean and Central Asia, these onions are closely related to the red onion family. Purple onions are medium to large in size, with a papery exterior and a crisp, juicy interior. Their flavor profile is milder and slightly sweeter than yellow onions, with a subtle peppery undertone that becomes sweeter when cooked or caramelized. The purple pigmentation comes from anthocyanins, water-soluble antioxidant compounds that give the onion its distinctive appearance and mild fruity notes.

Purple onions are valued in cuisines worldwide for their visual appeal and gentle flavor. Raw, they feature prominently in salsas, fresh salads, and ceviche, where their crispness and color enhance presentation. In cooked applications, they appear in Indian curries, Mediterranean stews, and grilled dishes, where their sweetness develops. They are excellent for caramelizing and are commonly used in sandwiches, burgers, and grain bowls. Purple onions work well in pickling and can be grilled or roasted whole. Their mild sweetness makes them suitable for both raw and cooked applications without overwhelming delicate ingredients.