Favourite Pickled Red Onions

These pickled red onions are the all-purpose condiment that belongs in every fridge. The technique is Yucatán-Mexican: a quick 45-second blanch in salted water knocks the harsh raw bite out of the onions, then they hit a brine of apple cider vinegar, garlic, salt, and a coarsely ground spice mix of black peppercorns, cumin seeds, and Mexican oregano. A few hours later, you’ve got a jar of vivid pink onions ready to brighten just about anything.

The coarse grind on the cumin and peppercorns is intentional. Whole spices barely flavor the brine; finely ground spices over-flavor and leave gritty bits. Coarse grinding with a mortar or spice grinder cracks the seeds open enough to release their oils without dissolving them entirely.

These keep covered in the fridge for several weeks, and the flavor only gets better with time. Use them on carnitas tacos, pulled pork sandwiches, grain bowls, avocado toast, or just stacked on a piece of buttered bread for a snack.

Pro Tips

• Slice the onions paper-thin (a mandoline helps). Thin slices pickle in hours; thick slices stay sharp and unbalanced for days.
• Don’t skip the 45-second blanch. It’s the difference between mellow, balanced pickled onions and harsh raw-onion-in-vinegar bite.
• Use Mexican oregano if you can find it. The citrus-and-grass notes pair perfectly with cumin; Mediterranean oregano tastes more piney and less authentic.
• Lightly toast the cumin and peppercorns in a dry pan for 30 seconds before grinding for amplified flavor.

Variations

• Add a sliced jalapeño or 1 teaspoon red pepper flakes for spicy pickled onions.
• Sub lime juice for half the vinegar for a brighter, more citrus-forward brine.
• Stir in 1 teaspoon honey or piloncillo for a sweet-and-tangy version that pairs especially well with smoky grilled meats.