PICKLED RED ONIONS

 

Quick Pickled Red Onions

These pickled red onions are the secret weapon your kitchen needs. They're tangy, slightly sweet, and add a brilliant pop of color and flavor to practically everything—tacos, sandwiches, salads, grain bowls, eggs, you name it.

The best part? They come together in about 10 minutes of actual work. A quick heat on the stove, a pour over the onions, and the fridge does the rest. An hour later, you have pickled onions. It feels a little like magic.

Why You'll Keep a Jar in Your Fridge

• So easy – If you can slice an onion and boil water, you can make these

• Instantly elevates everything – That bright pink color and tangy crunch makes any dish look and taste better

• Keeps for weeks – Always on hand when you need a flavor boost

• Customizable – Add your favorite spices and make it your own

• So much better than store-bought – Fresher, crunchier, and you control what goes in

Ingredients

• 1 large red onion

• ½ cup apple cider vinegar

• ½ cup water

• 1 tablespoon granulated sugar

• 1½ teaspoons salt

Optional Add-Ins (Mix and Match)

• 1 garlic clove, smashed

• ½ teaspoon black peppercorns

• 1 bay leaf

• ¼–½ teaspoon red pepper flakes (for heat)

• A few sprigs of fresh dill or thyme

Instructions

Step 1: Slice the Onion

Peel the red onion and slice it thinly into rings or half-moons. How thin? About ⅛ inch is perfect—thin enough to pickle quickly, thick enough to keep some crunch. Place the sliced onions in a clean 16-ounce glass jar.

Step 2: Make the Pickling Liquid

In a small saucepan, combine the apple cider vinegar, water, sugar, and salt. Stir everything together and place over medium heat. Heat just until the sugar and salt dissolve—you'll see the liquid go from cloudy to clear. Do not let it boil.

Step 3: Add Your Spices (If Using)

If you're adding any of the optional ingredients, drop them into the jar with the onions now.

Step 4: Pour and Submerge

Carefully pour the hot vinegar mixture over the onions in the jar. Make sure all the onions are completely submerged. If they're floating, you can press them down with a spoon or add a little extra water to cover.

Step 5: Cool and Refrigerate

Let the jar sit uncovered until it cools to room temperature. Then screw on the lid and pop it in the fridge.

Step 6: Wait (If You Can)

The onions are technically ready in about an hour—they'll be lightly pickled and delicious. But if you can wait a few hours or overnight, the flavor deepens and they become something truly special.

Tips for Perfect Pickled Onions

Slice evenly. Uniform slices mean consistent pickling. A mandoline makes quick work of this, but a sharp knife and steady hand work just fine.

Pack the jar loosely. You want the vinegar mixture to flow freely around all the onions. Overstuffing can lead to uneven pickling.

Don't skip the salt. It's not just for flavor—it helps preserve the onions and keeps them crisp.

Use a non-reactive container. Glass is perfect. Avoid metal bowls or containers, which can react with the vinegar.

Keep them submerged. If onions peek above the liquid, they can discolor or spoil. Weigh them down with a smaller jar or add a little extra vinegar-water mixture if needed.

Ways to Use Pickled Red Onions

• On tacos—any kind, but especially carnitas, fish, or black bean

• Piled onto sandwiches, burgers, or hot dogs

• Tossed into salads or grain bowls

• On top of avocado toast

• Alongside eggs—scrambled, fried, or in a breakfast burrito

• On a cheese or charcuterie board

• In rice bowls or buddha bowls

• On grilled meats or fish

• Stirred into tuna or chicken salad for crunch and tang

Variations to Try

Spicier: Add a full teaspoon of red pepper flakes or a sliced jalapeño to the jar

Herby: Tuck in a few sprigs of fresh dill, thyme, or oregano

Mexican-style: Add a pinch of dried oregano and a slice of jalapeño

Garlic-lover's: Use 2-3 smashed garlic cloves instead of one

Lime twist: Substitute half the water with fresh lime juice for extra brightness

Honey-sweetened: Replace the sugar with 1 tablespoon honey (stir until dissolved)

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Storage

Refrigerator: Store in an airtight jar for up to 2 weeks. The flavor will continue to develop over the first few days.

Note: These are refrigerator pickles, not shelf-stable. Always keep them cold.

Recipe Summary

• Prep time: 10 minutes

• Cook time: 5 minutes

• Total time: 1 hour 15 minutes (includes minimum marinating)

• Servings: About 8 (2 tablespoons per serving)

• Approximate calories: 15 per serving