Quick & Easy Pickled Red Onions
Posted on January 3, 2026
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These Quick & Easy Pickled Red Onions are tangy, crunchy, and about to become your new secret weapon in the kitchen! If you've never made pickled onions before, you're in for a treat because they're incredibly simple to make but add so much flavor to everything they touch. Thinly sliced red onions get packed into a jar and covered with a hot brine made from vinegar, water, sugar, and salt that transforms them from sharp and pungent to tangy, slightly sweet, and absolutely delicious. The vinegar gives them that classic pickle tang, the sugar balances the acidity with a touch of sweetness, and the salt enhances all the flavors while helping preserve them. Whole garlic cloves and peppercorns add aromatic depth and a subtle bite that makes these pickled onions more complex than your average quick pickle. The magic happens as they sit, the hot brine softens the onions and turns them this gorgeous bright pink color, while infusing every slice with flavor. After just an hour in the fridge, they're ready to eat, though they get even better after sitting overnight as the flavors develop and meld together. These pickled onions are incredibly versatile, pile them on tacos for acidity and crunch, layer them on sandwiches and burgers to cut through rich meats and cheese, toss them into salads for brightness, use them as a topping for grain bowls, nachos, or avocado toast, or honestly just eat them straight from the jar because they're that good. The best part? They last for two weeks in the fridge, so you can make a batch and have this flavor bomb ready to go anytime you need to elevate a meal. Once you start making these, you'll wonder how you ever lived without them!
Frequently Asked Questions
Q: Can I use white or yellow onions instead of red onions?
A: You can absolutely use white or yellow onions, and they'll pickle just as well! However, red onions are the most popular choice for pickled onions because they turn this gorgeous bright pink color when pickled, they're slightly sweeter and milder than white or yellow onions, and they look beautiful on plates with their vibrant color. White onions will stay white and have a sharper, more pungent flavor. Yellow onions will turn a brownish color and have a stronger onion flavor. If you want the classic look and mildest flavor, stick with red onions. But if you only have white or yellow on hand, go ahead and use them, they'll still be delicious!
Q: Do these need to be processed in a water bath for canning, or can I just store them in the fridge?
A: These are "quick pickles" or "refrigerator pickles," which means they're meant to be stored in the refrigerator and consumed within 2 weeks, not shelf-stable canned pickles. You do NOT need to process them in a water bath canner. Just let them cool, seal the jar, and pop them in the fridge. This is what makes them "quick and easy"! If you want to make shelf-stable pickled onions that can sit in your pantry for months, you'd need to use a proper canning recipe with the right vinegar-to-water ratio and process them in a boiling water bath. But for these, refrigeration is all you need, and honestly, they taste so good you'll finish them long before 2 weeks anyway!
Q: My pickled onions taste too sharp and vinegary. What did I do wrong?
A: Don't worry, this is an easy fix! If they taste too sharp and vinegary, there are a few adjustments you can make: (1) Add more sugar, start with an extra tablespoon and taste. Sugar balances the acidity. (2) Let them sit longer, quick pickles mellow out significantly after 24-48 hours in the fridge as the flavors balance. (3) Rinse them before using, if they're already made and too acidic, drain some of the brine and rinse the onions under cold water before adding them to your dish. (4) For next time, use a mix of half red wine vinegar and half apple cider vinegar, or reduce the vinegar to ¾ cup and increase the water to 1¼ cups for a milder brine. Everyone's taste is different, so feel free to adjust the sugar and vinegar ratios to your preference!
Q: Can I add other vegetables to pickle with the onions?
A: Absolutely! Quick pickling works beautifully with many vegetables. You can add thinly sliced jalapeños or other peppers for a spicy kick, sliced carrots (cut them extra thin or shave them with a vegetable peeler), thinly sliced radishes for color and crunch, cucumber slices, cauliflower florets (blanch them first for 2 minutes), or even thinly sliced beets (though they'll turn everything pink!). Just make sure whatever you add is cut thin enough to pickle quickly. If you're adding vegetables that are denser than onions (like carrots or cauliflower), you might want to blanch them for 1-2 minutes first so they soften slightly. The brine ratio in this recipe works for most vegetables, so feel free to get creative and make your own custom quick pickle mix!
These Quick & Easy Pickled Red Onions are tangy, crunchy, and incredibly versatile! Thinly sliced red onions get pickled in a simple brine of vinegar, water, sugar, and salt with garlic and peppercorns for extra flavor. They're ready in just an hour and add a bright, acidic crunch to sandwiches, tacos, salads, burgers, or anything that needs a flavor boost. Once you start making these, you'll always keep a jar in your fridge!
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Preparations
Prep Time:
10 minutes
Cook Time:
5 minutes
Pickling Time
1 hour
Total Time:
1 hour 15 minutes
Cuisine:
American
Course:
Side Dish, Condiment
Calories:
15 kcal (approx. per serving)
Servings:
About 2 cups (one 16 oz jar)
Author:
Ronica Rupan
Ingredients
Ingredients
- 2 medium red onions, thinly sliced
- 1 cup water
- 1 cup red wine vinegar (or apple cider vinegar, or a combination)
- 2 teaspoons kosher salt
- 2 tablespoons granulated sugar
- 3-4 whole garlic cloves, peeled
- 1 teaspoon whole black peppercorns
Instructions
1. Prep Your Onions
Peel and slice your red onions as thin as possible, ideally using a mandoline or a very sharp knife. Aim for slices that are almost paper-thin, about ⅛ inch thick or thinner. Separate the slices into rings. Transfer the onion rings to a clean 16-ounce (pint-sized) mason jar or heat-safe container. Pack them in fairly tight, but don't crush them. The jar should be about three-quarters full of onions.
2. Prepare the Brine
In a medium saucepan, combine the water, red wine vinegar (or apple cider vinegar, or a mix of both), kosher salt, and sugar. Place the pot over medium-high heat.
3. Bring to a Boil
Heat the mixture, stirring occasionally, until it comes to a boil and the sugar and salt are completely dissolved. This should take about 3-5 minutes. You'll know the sugar and salt have dissolved when the liquid is clear with no visible granules.
4. Add Aromatics
Once the brine is boiling and the sugar has dissolved, add the whole garlic cloves and peppercorns directly to the pot. Let them steep in the hot brine for about 1 minute to release their flavors.
5. Pour Over Onions
Carefully pour the hot brine over the sliced onions in the jar, making sure to include the garlic cloves and peppercorns. The hot liquid should completely cover the onions. If it doesn't quite cover them, add a little more vinegar or water (in equal parts) until they're submerged. Use a spoon to gently press the onions down if needed.
6. Cool to Room Temperature
Let the jar sit uncovered on the counter until it cools to room temperature, about 30-45 minutes. You'll notice the onions starting to turn a beautiful bright pink color as they pickle. The raw sharpness will begin to mellow out.
7. Seal and Refrigerate
Once the mixture has cooled completely, seal the jar with a tight-fitting lid. Place it in the refrigerator.
8. Rest and Enjoy
Let the onions pickle in the fridge for at least 1 hour before using them. This gives the flavors time to develop. For the best flavor, let them sit overnight if you have time. After an hour, they're ready to use! Serve on sandwiches, tacos, salads, burgers, grain bowls, or eat them straight from the jar.
Serving Suggestions
- On Tacos: Pile them high on fish tacos, carnitas, or any taco for brightness and crunch
- Sandwiches & Burgers: Layer them on sandwiches, burgers, or bánh mì
- Salads: Toss them into green salads, grain bowls, or potato salad
- As a Garnish: Top avocado toast, deviled eggs, hummus, or charcuterie boards
- With Proteins: Serve alongside grilled chicken, steak, or salmon
- Straight from the Jar: Honestly, they're delicious on their own as a snack!
Cooking hacks and tips
- Shelf life: These pickled onions stay fresh in the refrigerator for up to 2 weeks in a sealed jar.
- Slice them thin: The thinner your onion slices, the faster they'll pickle and the better they'll absorb the brine. Use a mandoline for the most consistent, thin slices.
- Vinegar options: Red wine vinegar gives the prettiest pink color and classic tang. Apple cider vinegar is milder and slightly sweet. You can use all of one or a combination of both!
- Customize the flavors: Add red chili flakes for heat, mustard seeds for tang, fresh thyme or oregano for herbs, or bay leaves for depth.
- Use immediately or wait: They're ready after 1 hour, but the flavor gets even better after 24 hours when they've had time to fully pickle.
- Keep them submerged: Make sure the onions stay covered with brine. If some float to the top, gently press them down when you open the jar.
- Jar size: A 16 oz (pint) mason jar is perfect for this recipe. You can also use a 24 oz jar if you want to double the recipe.
- Sweet vs. tangy: Like them sweeter? Add an extra tablespoon of sugar. Prefer more tang? Add an extra ½ cup vinegar and reduce the water.
- Color note: The onions will turn a vibrant pink-purple color as they pickle. This is totally normal and beautiful!
- Not a fermented pickle: These are quick pickles preserved with vinegar, not fermented pickles. They need to stay refrigerated.
- Reuse the brine: Once you've eaten all the onions, you can add more sliced onions to the jar and reuse the brine once. Just bring it back to a boil before pouring over fresh onions.
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This is where I love to share my passion for cooking, baking, and flavor. When I’m not creating delicious recipes, you’ll find me spending time with my family, working on my spice blends at Flora & Mana, or enjoying a homemade baked goods. Join me on this culinary journey to taste, healthy meals and fun kitchen hacks!
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Comments (2)
Clarice
I have enjoyed your videos so much. Very creative. I would never thought about “angel Eggs”. Thank you so much. Your recipe will be the only way (going forward) for me to present these divinely inspired eggs.
Ronica Rupan
Thank you!!