Recipe

Quick Pickled Red Onions

A punchy, crunchy topping you can make in minutes with pantry vinegar, a little sugar, and optional spices.

By Matt Campbell

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4.8

A glass jar filled with bright pink quick pickled red onions on a clean kitchen counter with a small bowl of tacos in the background

Pickling is one of those kitchen moves that feels like magic, but it is really just vinegar, salt, and a little patience. And when you want the payoff today, quick pickles are the answer. These quick pickled red onions are my go-to because they wake up basically anything: tacos, grain bowls, burgers, scrambled eggs, even that sad desk salad you brought to work as a “fresh start.”

We are doing a simple hot brine that softens the bite just enough while keeping the onions crisp. They turn that gorgeous pink in the jar and taste like tangy, lightly sweet, gently spiced confidence.

Red onions, white vinegar, apple cider vinegar, kosher salt, sugar, peppercorns, and garlic cloves arranged on a bright kitchen counter for pickling

Why It Works

Fast flavor: Hot brine gets you delicious pickled onions in as soon as 30 minutes.
Crisp, not mushy: A quick pour-over keeps the onions snappy while mellowing harsh raw onion burn.
Flexible brine: Use white vinegar for sharp and clean, apple cider for a softer tang, or a mix of both.
Endlessly useful: One jar upgrades weeknight meals all week long.

Pairs Well With

Storage Tips

Refrigerate: Keep pickled onions in a sealed jar or container in the fridge. They are best after a few hours and stay great for about 2 weeks.

Keep them submerged: Onions last longer and taste better when they stay under the brine. If some float up, press them down with a clean spoon.

Use clean utensils: Grab onions with a clean fork or spoon (not your fingers) to help them last.

When to toss: Discard if the brine turns very cloudy, smells off, gets fizzy, or you see any mold.

Do not can this recipe: This is a refrigerator pickle, not a shelf-stable canning recipe.

Reuse the brine: You can quick-pickle a second batch of onions or thinly sliced cucumbers in the leftover brine, but the flavor will be a little lighter the second round.

Common Questions

How long do quick pickled red onions take?

You can eat them after 30 minutes, but they taste even better after 2 to 4 hours as the brine works its way into every layer. If your slices are thicker, give them a little more time.

Why did my onions turn bright pink?

That is the natural pigment in red onions reacting with the vinegar. It is normal and honestly part of the fun.

Do I have to boil the brine?

You do not need a rolling boil. Bring it to a simmer just long enough to dissolve the salt and sugar, then pour it over the onions. The heat helps the onions soften slightly and absorb flavor faster.

Can I make these without sugar?

Yes. The sugar balances the vinegar, but you can reduce it or skip it. If you skip it entirely, consider adding a pinch more salt or a splash of apple cider vinegar to keep the flavor rounded.

What vinegar works best?

My favorite is a 50-50 mix of white vinegar and apple cider vinegar. White vinegar is crisp and bold, while apple cider vinegar adds a mellow fruitiness.

Are these spicy?

Only if you want them to be. Add a pinch of red pepper flakes or a sliced jalapeño for heat.

Do I serve them with brine?

Usually I grab them with a fork and let the extra brine drip back into the jar. If you want more tang, spoon a tiny splash of brine onto tacos or bowls like a mini sauce.

Matt Campbell

I have always had a huge passion for the culinary arts, people, working as a team, and so on. I wanted to pursue my love for cooking initially at Virginia Commonwealth University with a culinary arts degree; however, I instead decided to apply myself and acquire more practical skills. My end goal is to eventually open my own restaurant or similar establishment.

Kitchen Essentials

1 pint jar (16-ounce) or similar heat-safe container with lid
Small saucepan
Chef’s knife and cutting board
Measuring cups and spoons
Kettle (optional, if you prefer heating water separately)

Quick safety note: If you are pouring hot brine into a glass jar, warm the jar first with hot tap water to reduce the chance of thermal shock. Or use a heat-safe container made for hot liquids.

I started making quick pickled onions when I was trying to cook “simple” but kept getting bored halfway through eating. You know the feeling: the meal is fine, but it needs a spark. A jar of these in the fridge is that spark. I like to make them while I am waiting on rice or browning ground turkey, then I feel weirdly proud dumping a handful on top like I planned the whole thing from the beginning.