How pickled red onions became a Yucatán culinary cornerstone

Red onions have long been a key ingredient in Mexican cooking, especially in the Yucatán Peninsula. Introduced after the Spanish conquest, they became a staple in dishes like cochinita pibil and ceviche. Their sharp, bright flavour is often softened through pickling, creating a tangy condiment loved across the region.

The author first encountered red onions after moving to the Yucatán in 1980. Growing up in Tampico, they had only known white onions. But in the Yucatán, red onions—called cebollas moradas—play a central role in local cuisine, blending Mayan traditions with Spanish influences.

To pickle them, onions are sliced into thin strips, about 1/4-inch thick. Some cooks blanch them first to reduce their sharpness. The slices are then mixed with seasonings—sometimes including allspice berries for extra depth—before being covered in white vinegar. The mixture is refrigerated for at least a couple of hours before serving. Once ready, the pickled onions can top tacos, tostadas, sandwiches, or grilled meats. They also pair well with other pickled ingredients, like jalapeños and carrots, often used in pork tamales. Stored in the fridge, pickled red onions stay fresh for up to two weeks.

Pickled red onions remain a versatile and enduring part of Yucatán's food culture. Their tangy crunch complements rich, spiced dishes, keeping a centuries-old culinary tradition alive. The simple process of slicing, seasoning, and soaking in vinegar preserves their flavour for weeks.