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Pickled Red Onion Recipe

Wondering how to make pickled red onions? This pickled red onion recipe only takes 4 ingredients and a few steps!

a mason jar of pickled red onions

Pickled Red Onion Recipe

Pickled red onions have to be one of the most underrated ingredients to add immediate flavor and texture to just about any of your dishes! It only takes a few ingredients to throw together and a majority of the time is completely hands off. 

The best part is that you don’t even have to know how to can anything in order to make this. I know I for one was wildly intimidated by canning after hearing all of the things that could go wrong in my food science classes in college. 

This is considered a quick pickle so there’s no sealing the jars for later. It will pickle right in the heat and liquid. They last a significant amount of time less and aren’t shelf stable, but you’ll be able to throw these together in no time after you do it once. 

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close up of thinly sliced red onions

How To Make Pickled Red Onions

Making pickled red onions is quick and easy! It takes a few minutes to cut the onions and boil the liquid and that’s about all the hands on time that you need. 

Cut the red onions into strips or however you’d like them to be and place them in your mason jar or other non-reactive vessel that you can seal. 

In a medium saucepan, you’ll bring the vinegar, sugar, and salt to a boil. Be sure to stir this liquid a bit so the sugar and salt dissolve. 

Carefully, you’ll pour the liquid into the mason jar and let cool to room temperature without a lid on it. I like to stir the mixture every 10 minutes or so for the first 30 minutes that you can let some of the heat escape.

Once it’s cool, you’ll just top the jar with a lid and save in your refrigerator! It should last between 2-3 weeks, but I’ve usually gone through the whole jar in about a week since it’s just so good on everything.

three bowls of ingredients with salt, sugar, and raw red onions

How should I cut the onions?

If you already have a mandoline, you can use that to get perfect thinly sliced onions. Be careful with those if you’ve never used one though as it can be easy to cut yourself! Speaking from experience on that one. 

I personally just like using a knife to thinly slice the halves of the onion to make individual strips. We’ve also made them doing large diced pieces which disperses throughout your food when you mix it a little better. 

Some people like making them into very thin rounds of the onion to help get it out of the jar with a fork a little easier too. It’s really up to you! I suggest trying a few different cuts and seeing which you like best.

What is in the pickling liquid? 

It’s just a few ingredients! You’ll just need vinegar, sugar and salt to make the liquid. Once it’s all boiled together, the sugar and salt dissolve to make a tasty pickling liquid. If you don’t like using refined sugar, you could try replacing it with maple syrup or honey too.

Since there are also so few ingredients in the liquid, if you have kosher salt, I’d recommend using that! Kosher salt has a slightly larger crystal size and no iodine which both give it a better flavor and allows you to control the amount of salt a little better. No worries if you don’t have it though! I’ve made it plenty of times with good ole table salt.

a mason jar of raw red onions

What kind of vinegar should I use?

I generally use white vinegar just because I have it readily available, but you can use just about anything besides something like balsamic vinegar. 

Some other popular choices are red wine vinegar for more depth and color, apple cider vinegar for some sweetness, or rice vinegar if you’re looking for another pale vinegar to bring out the colors.

Can I add other ingredients to add other flavors?

Definitely! Here’s just a few things I’ve tried, but really, you can let your mind run wild:

  • Whole peppercorns
  • Garlic cloves
  • Red pepper flakes 
  • Fresh herbs like thyme
  • Mustard seeds

You can put them in the jar with the onions to add the flavorings or boil them with the vinegar.

a mason jar of red onions with vinegar added

What should I use quick pickled red onions for? 

Just about anything your heart desires! Add it to sandwiches, your scrambled eggs in the morning, rice bowls, tacos, as a barbecue topping… the options are endless. They’d be particularly great on these Fish Tacos with Pineapple Mango Salsa and Tuna Avocado Lettuce Wraps

Looking for other side dishes perfect to add to any dishes? Try one of these:

a mason jar of pickled red onions

Pickled Red Onions

Yield: 16 oz
Prep Time: 10 minutes
Cook Time: 5 minutes
Total Time: 15 minutes

Wondering how to make pickled red onions? This pickled red onion recipe only takes 4 ingredients and a few steps!

Ingredients

  • 1 medium red onion, sliced (around 2 cups)
  • 1 cup white vinegar
  • 2 Tbsp. sugar
  • 1 Tbsp. salt

Instructions

  1. Add sliced onions to a glass or other non-reactive lidded jar. A jar around 16 oz. for about 2 cups of sliced onions works well.
  2. In a small saucepan, add vinegar, sugar and salt. Stir to combine to ensure sugar and salt are dissolved. Bring to a boil over medium-high heat. 
  3. Once boiling, carefully pour mixture into the jar with the onion slices. You may want to put the jar in a sink and pour to help contain any spills.
  4. Let mixture cool completely and stir occasionally while cooling. Once cool, add your lid to your jar and refrigerate. These can be stored in the refrigerator for 2-3 weeks.

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As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases.

Nutrition Information:
Yield: 8 Serving Size: 1
Amount Per Serving: Calories: 23Total Fat: 0gSaturated Fat: 0gTrans Fat: 0gUnsaturated Fat: 0gCholesterol: 0mgSodium: 873mgCarbohydrates: 4gFiber: 0gSugar: 4gProtein: 0g

Nutrition provided is only an estimate.

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