Quick Pickled Red Onions Recipe

I always keep a jar of pickled red onions in my fridge. They’re one of those little things that make ordinary food taste amazing.

Pickled Red Onions in a jar

They’re tangy, a little sweet, still crunchy, and they last for weeks. Once you start making them, you’ll be addicted to them.

Pickled Red Onions Recipe

Key Ingredients

Red onions are the main ingredient. Yellow or white onions work but they stay harsher and look washed-out gray, missing that signature bright pink pop.

Pickled sliced Red Onions ingredients

Apple cider vinegar gives the onions a mellow, slightly fruity tang that isn’t as aggressive as plain white vinegar. It softens the raw onion into a balanced sweet-sour finish. White vinegar works in a pinch but tastes sharper and more one-dimensional against the onion.

Sugar balances the vinegar’s acidity so the onions taste bright and tangy rather than mouth-puckeringly sour. It rounds out the brine into that addictive sweet-sour flavor. Don’t skip it!

Tips to Make It Perfect

Slice the onion as thin as you can: Thin slices soften and take on the brine faster, and they have a much nicer texture than thick, crunchy wedges. Thick slices stay raw and harsh in the middle even after pickling.

How to make Pickled Red Onion step by step

Pour the brine over hot and press the onions under: The hot brine kickstarts the pickling and softens the onions faster than a cold one. I press them down with a spoon so every slice is submerged, since any onion above the liquid stays raw and doesn’t turn pink.

Wait at least 30 minutes, but a few hours is better: They’re good to go in half an hour, but the color and flavor keep deepening as they sit. I make a jar in the morning for tacos that night and they’re perfect by then. The longer they rest, the more vivid and tangy they get.

This is my simple recipe for pickled red onions:

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Pickled Red Onions

Pickled Red Onions

Bright pink, tangy quick-pickled red onions ready in just 30 minutes. Crisp, sweet-sour, and the perfect finishing touch for tacos, burgers, salads, and sandwiches.

⏱ Prep 10 min🔥 Cook 2 min⏰ Total 42 min⏳ Pickle Time 30 min🟢 Easy🍽 Condiment🌍 American
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Ingredients

Servings:
8
US Metric
  • 1 largered onion (thinly sliced)
  • ¾ cupapple cider vinegar
  • ¾ cupwater
  • 1 tablespoonsugar
  • 1½ teaspoonssalt
  • 1 clovegarlic (smashed)
  • ½ teaspoonwhole black peppercorns

Instructions

  1. 1Thinly slice the red onion and pack it into a clean pint jar.
  2. 2Tuck the smashed garlic and peppercorns in with the onions.
  3. 3In a small saucepan, combine the vinegar, water, sugar, and salt. Bring to a simmer and stir until dissolved.
  4. 4Pour the hot brine over the onions until fully submerged. Press them down so they stay under the liquid.
  5. 5Let sit at room temperature for at least 30 minutes.
  6. 6Seal and refrigerate.

Nutrition per serving

20
cal
4g
carbs
350mg
sodium

📌 Notes

  • Slice the onion as thin as you can. Thin slices soften and pickle faster and have a better texture.
  • They're ready to eat in 30 minutes but the color and flavor deepen after a few hours in the fridge.
  • Keeps in the refrigerator for up to 2 weeks.
  • Use the leftover brine to quick-pickle another batch or as a tangy splash in dressings.

How to Pair

Pickled red onions taste tangy, lightly sweet, and crisp. Their bright acidity balances rich, spicy, smoky, and savory foods. Here are some pairings you can try:

Pickled sliced Red Onions with whole black peppercorn
  • Add them to beef tacos, chicken quesadillas, or loaded nachos for a fresh, zesty crunch.
  • Layer them onto burgers, pulled pork sandwiches, or avocado toast to cut through rich flavors.
  • Grain bowls, roasted vegetables, or black bean salads for extra color and acidity.
  • Grilled fish, barbecue chicken, or creamy hummus wraps for a sharp finishing touch.

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