Sweet, tangy, crisp, and beautifully colorful, these easy pickled red onions are one of the simplest ways to add bright flavor to everyday meals. This quick refrigerator method requires no canning, no special equipment, and only a handful of basic ingredients. Use them on salads, tacos, sandwiches, burgers, burritos, grain bowls, charcuterie boards, and more whenever you want a fresh, zesty topping.
These quick pickled red onions are the kind of condiment you will want to keep in the fridge all the time. They take just minutes to prepare, and after a short rest in the brine, the onions soften slightly while keeping a pleasant bite. Their sharp raw onion flavor mellows into something balanced, lightly sweet, salty, and tangy.
The vibrant pink color also makes them a beautiful finishing touch. A spoonful can make simple meals look more appealing and taste more complete. They pair especially well with fish, pork, salads, tacos, sandwiches, and rich dishes that need a little acidity to brighten each bite.
If you enjoy homemade condiments that are practical, flavorful, and easy to make ahead, this refrigerator pickled onion recipe is a great one to add to your routine.
Why You Will Love This Pickled Red Onion Recipe
- Bold flavor: These onions are sweet, salty, tangy, and crisp. They add instant brightness to both simple and hearty dishes.
- Easy to make ahead: A jar keeps well in the refrigerator, so you can prepare them once and use them throughout the week.
- No canning required: This is a quick refrigerator pickle recipe, so there is no need for water-bath canning or complicated preserving steps.
- Versatile topping: Use them on tacos, burgers, sandwiches, nachos, salads, quesadillas, burritos, and charcuterie boards.
- Simple ingredients: You only need red onion, vinegar, salt, sweetener, and warm water, with optional add-ins for extra flavor.
Ingredients
- Red onion: Use one large red onion and slice it as thinly as possible. Thin slices pickle faster and create the best texture.
- Salt: Sea salt or kosher salt works well for the brine. It seasons the onions and helps balance the vinegar.
- Sweetener: Granulated cane sugar, honey, maple syrup, or agave can be used. The sweetener softens the acidity and gives the onions a more rounded flavor.
- White wine vinegar: White wine vinegar gives the onions a clean, tangy pickled taste. Rice vinegar, apple cider vinegar, or red wine vinegar can also be used.
- Warm or hot water: Warm water helps dissolve the salt and sweetener. Avoid using boiling water.
- Optional add-ins: For extra flavor, add black peppercorns, red pepper flakes, a small garlic clove, fresh herbs, bay leaf, cumin seeds, fennel seeds, coriander seeds, or a splash of lime juice.
How to Make Pickled Red Onions
- Slice the red onion very thinly. A mandoline makes this quick and helps create even slices, but a sharp knife also works.
- Place the sliced onions into a clean mason jar or divide them between several smaller jars. A heat-safe bowl can also be used if you do not have a jar.
- In a measuring cup, combine the vinegar, salt, sweetener, and warm water. Stir until the salt and sweetener dissolve completely.
- Pour the brine over the sliced onions, making sure they are fully submerged in the liquid. Press the onions down gently if needed.
- Let the onions sit at room temperature for about one hour. Once the brine has cooled, cover the jar and store it in the refrigerator for up to three to four weeks.
TIPS FROM NELI’S KITCHEN
Recipe Notes and Tips for Pickled Red Onions
- Slice the onions as thinly as possible so they absorb the brine quickly and evenly.
- Use warm or hot water for the brine, but do not use boiling water.
- Choose a jar large enough for the onions to stay completely covered by the liquid.
- Allow the brine to cool before sealing the jar and placing it in the refrigerator.
- If the onions rise above the liquid, press them down with a clean spoon before storing.
How Long Do Pickled Red Onions Keep?
Once prepared, these pickled red onions can be stored in the refrigerator for up to four weeks. For the best quality, always keep the onions fully submerged in the pickling liquid. If they are exposed to air for too long, they may spoil more quickly.
You can enjoy them after about one hour, but the flavor becomes stronger and more developed as they sit. After a day in the refrigerator, the onions usually have a deeper color, a softer texture, and a more balanced sweet-tangy taste.
Can You Make This Recipe with Yellow or White Onions?
Yes, this same quick pickling method can be used with yellow or white onions. Red onions are often preferred because they have a milder flavor and turn a beautiful pink color in the brine. Yellow and white onions will taste a little sharper and will not have the same bright color, but they can still be pickled using this recipe.
You can also use a similar brine for other vegetables, including cauliflower, carrots, beets, and cucumbers. The timing may vary depending on the vegetable and how thinly it is sliced.
What Do You Serve with Pickled Red Onions?
Pickled red onions are a fresh, flavorful condiment that works with many meals. Their acidity cuts through rich foods, while their sweetness makes them easy to pair with savory dishes. Add them to sandwiches, burgers, burritos, quesadillas, nachos, salads, tacos, wraps, and charcuterie boards for extra crunch and brightness.
They are especially delicious with fish tacos, shrimp tacos, tuna salad sandwiches, chef salads, pulled pork, grilled meats, and snack boards. A small amount can completely change the flavor of a dish, making it taste fresher and more balanced.
More Condiment Recipes
- Honey Mustard Dressing
- Homemade Almond Butter
- Garlic Butter
- Fry Sauce
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Pickled Red Onions
Ingredients
- 1 large red onion
- 1 Tablespoon salt
- 1 Tablespoon sugar or honey
- 1 cup white wine vinegar, rice vinegar or apple cider vinegar
- 1 cup warm or hot water
Optional
- Black peppercorns
- 1 small clove of garlic, halved
Instructions
-
Slice the red onion as thinly as possible. A mandoline is helpful for even slices.
-
Place the sliced onion in one clean jar, several smaller jars, or a bowl.
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In a measuring cup, stir together the vinegar, salt, sugar or honey, and warm water until dissolved. Pour the brine over the onions, making sure they are fully covered. Let them sit for one hour at room temperature, then cover and refrigerate for up to three to four weeks.
Notes
- Thin onion slices pickle faster and have the best texture.
- The brine water should be hot or warm, not boiling.
- Keep the onions fully submerged while storing.
- Let the brine cool completely before sealing the jar.
Nutrition
| Carbohydrates: 6g
| Protein: 1g
| Fat: 1g
| Sodium: 1750mg
| Sugar: 4g
Nutrition Disclaimer: Nutritional values are estimates and may vary with ingredients, brands, and portion sizes. For accuracy, use your preferred nutrition calculator.