Pickled Red Onions

🧅 Essential Condiment

Pickled Red Onions

Bright. Tangy. Makes everything better.

Prep

10 mins

Marinate

8+ hrs

Yield

1 quart jar

This is one of my favorite condiments. Red onions are prolific in Panama, it's easy to make, and makes everything you add it to pop. Once you have a jar of these on hand, you'll find yourself using them everywhere: on tacos, salads, poke bowls, soups, even sandwiches. The vinegar softens the onion's natural bite while keeping it crisp, and the aromatics (bay, peppercorn, garlic) add depth that keeps these interesting no matter how many times you use them.

Best of all? You make them once and they keep for weeks. No active cooking. Just throw everything in a jar and let time do the work.

Why This Recipe

It's genuinely one-jar simple. Mix everything together, add the onions, and that's it. No cooking, no special equipment, no technique. If you can slice an onion, you can make this.

They improve everything. Tacos? Better. Salads? Better. Poke bowls? Better. Rice bowls, soups, sandwiches, cheese boards—these onions elevate simple food into something crave-worthy.

They last up to a month. Properly stored in the refrigerator, these keep for 3–4 weeks. One batch made on Sunday feeds you through the following weekend. They're always available when you need them.

The flavor is balanced. Red wine vinegar provides brightness and body. Bay and peppercorn add complexity. Garlic adds depth. Sugar balances everything. The result is sophisticated without being aggressive.

They taste restaurant-quality. This isn't grocery-store pickled onion quality. This is the stuff you'd pay extra for on a fancy dish. You just made it at home for pennies.

About the Ingredients

🧅 Red Onions

Red onions, sliced thinly and separated into rings. Red onions have more natural sugar and milder flavor than yellow onions, making them ideal for pickling. They also stay vibrantly colored in the vinegar, which is visually stunning. Choose firm, fresh onions without soft spots. Slice them about ¼ inch thick—thin enough to soften quickly, thick enough to stay crisp.

🍷 Red Wine Vinegar

Red wine vinegar is the backbone of this condiment. It provides brightness, complexity, and preservative power. It's milder and more nuanced than distilled vinegar, with subtle fruit notes that elevate the final product. Use a quality brand—you'll taste the difference.

🌿 Aromatics & Seasonings

Bay leaves add subtle herbal depth. Peppercorns provide gentle spice and complexity. Garlic cloves add pungency and savory notes. Sugar balances the acidity and softens the onion's raw bite. Salt acts as preservative and flavor enhancer. Each ingredient plays a role in the final balance.

💧 Water

Water dilutes the vinegar slightly, making the pickling liquid gentler on the onions' texture while still providing plenty of acid for preservation and flavor. It prevents the onions from becoming too sharp or one-dimensional.

Pro Tips

Slice onions uniformly and separate into rings. Uniform thickness ensures even pickling. Separated rings are easier to use and look better. A mandoline makes this faster, but a sharp knife works fine.
Don't skip soaking the onions in the pickling liquid overnight. The onions need at least 8 hours to soften and absorb the flavors. Overnight soaking (12 hours) is even better. The longer they sit, the more pickled they become.
Use a clean, sterilized jar. Wash your jar and dry it completely before filling. If you want to be extra cautious, run it through the dishwasher. Clean conditions = longer shelf life.
You can use fresh or bruised garlic cloves. Whole garlic cloves are fine. If you prefer less garlic intensity, slice them thin so they distribute more evenly. Minced garlic will cloud the liquid.
Don't crush the peppercorns. Leave them whole so the liquid stays clear and you can easily fish them out when serving. Crushed peppercorns will give you a cloudy, speck-filled liquid.
Taste after 24 hours and adjust if needed. If the onions are too acidic, add a bit of water. If they're not tangy enough, add a splash more vinegar. Personal preference varies, so adjust to your taste.
Store in the refrigerator, not on the counter. They'll last 3–4 weeks refrigerated. The cold slows fermentation and keeps them crisp. Don't leave them at room temperature.
Save the pickling liquid. Even after you've eaten all the onions, the liquid is valuable. Use it in dressings, marinades, or to pickle more vegetables. You can extend it by making a fresh batch and reusing the old liquid.
Use them on everything. Tacos, salads, poke bowls, grain bowls, soups, sandwiches, cheese boards, ceviche—these onions belong everywhere. Don't save them for special occasions. They're a daily ingredient.

Recipe

Ingredients (Makes 1 quart jar)

For the Pickling Liquid:

2 cups red wine vinegar
1 cup water
2 bay leaves
2 teaspoons black peppercorns (whole)
2 tablespoons sugar
2 teaspoons salt
3 garlic cloves, whole or halved

For the Onions:

3 medium red onions, thinly sliced and separated into rings

Instructions

In a clean quart-sized jar (or similar container), combine the red wine vinegar, water, bay leaves, peppercorns, sugar, salt, and garlic cloves.
Stir well to dissolve the sugar and salt completely.
Slice the red onions thinly (about ¼ inch thick) and separate the slices into individual rings.
Add all the onion rings to the jar with the pickling liquid. Stir gently to ensure the onions are submerged in the liquid.
Cover the jar with a lid (a regular canning lid or any clean lid will do).
Refrigerate overnight (or at least 8 hours) before using. The onions will continue to improve for up to 24 hours, becoming increasingly pickled and tender.
Use immediately or store in the refrigerator for up to 3–4 weeks.

Onion size matters: Use medium-sized red onions. If you use very large onions, you'll end up with fewer rings and may need to adjust the recipe proportions. If you use smaller onions, you'll have more rings and might need slightly more liquid. A good rule of thumb: your onion rings should be submerged and have a little liquid covering them.

Slicing uniformly: Uniform thickness ensures even pickling. Use a mandoline for speed, or a sharp knife with patience. Thinner slices (closer to ⅛ inch) pickle faster and become more tender. Thicker slices (¼ inch) maintain more texture and crunch.

Vinegar substitutions: While red wine vinegar is ideal, you can substitute with sherry vinegar (slightly sweeter, more complex) or apple cider vinegar (milder, slightly sweet). Avoid distilled white vinegar—it's too harsh and one-dimensional.

Flavor adjustments: If you prefer spicier pickled onions, add a pinch of red pepper flakes or a sliced Thai chili. If you like them sweeter, add another tablespoon of sugar. If you want them more tangy, reduce the water to ¾ cup. Taste after 24 hours and adjust to your preference.

Storage and reuse: Store in the refrigerator in an airtight jar. The pickling liquid can be reused—make another batch and use the old liquid mixed with a fresh batch. This creates even more interesting, layered flavors. The onions will keep for 3–4 weeks. Discard if they develop any off smell or mold.