Pickled red onions are a simple yet flavorful addition to countless dishes. With their tangy, slightly sweet taste and vibrant pink color, they can instantly elevate tacos, salads, sandwiches, and grain bowls.

This pickled red onion recipe is quick to make, requires minimal ingredients, and can be ready in just over an hour.

Prep Time: 10 mins	Cook Time: 5 mins	Total Time: 1 hr 15 mins
Servings: 6-8	Yield: 2 cups	Jump to Recipe

Why You Will Love This Pickled Red Onion Recipe

There are so many reasons this pickled red onion recipe will become a staple in your kitchen:

Quick & Easy: From start to finish, it takes just over an hour, with only 10 minutes of active prep.
Versatile: Perfect on tacos, salads, sandwiches, grain bowls, burgers, and even cheese boards.
Bright & Flavorful: The tangy, slightly sweet flavor adds an instant pop to any dish.
Healthy & Low-Calorie: At just 15 kcal per serving, it’s a guilt-free way to boost flavor.
Customizable: Add spices, herbs, or sweetness to suit your taste. You can make it spicy, sweet, or herb-infused effortlessly.
Long-Lasting: Stored properly in the fridge, a jar lasts up to 3 weeks, giving you a convenient, ready-to-use condiment.

Key Ingredients in Pickled Red Onions

Red onions: Provide the signature crisp texture and slightly sweet flavor.
Vinegar: Balances sweetness with tang and preserves the onions. Apple cider or white wine vinegar works best.
Sugar: Softens the sharpness of the onion and adds a gentle sweetness.
Salt: Enhances flavor and helps draw out moisture from the onions.
Optional aromatics: Garlic and peppercorns give an extra depth of flavor.

How to Make Pickled Red Onions

Slice the onions: Peel and slice the red onions thinly. A mandoline helps with uniform slices, but a sharp knife works perfectly too.
Prepare the brine: In a small saucepan, combine vinegar, water, sugar, and salt. Heat until sugar and salt dissolve completely. Remove from heat.
Pack the jar: Place the onions in a clean glass jar. Add garlic and peppercorns if using.
Pour the brine: Pour the warm vinegar mixture over the onions, ensuring they are fully submerged.
Rest & chill: Let the jar cool to room temperature, cover, and refrigerate for at least 1 hour. The onions will turn bright pink and develop their signature tangy flavor.

Pickled Red Onion Variations

Spicy: Add a few sliced jalapeños or a pinch of red chili flakes to the jar.
Sweet & Fruity: Substitute half the water with orange juice or add a few slices of fresh apple.
Herb Infused: Add sprigs of thyme, rosemary, or dill for aromatic flavors.
Quick Pickle: For faster results, thinly slice the onions and let them sit in the brine at room temperature for 30 minutes.

How to Use Pickled Red Onions

Tacos & Burritos: Add a punch of flavor to meats, beans, or veggie fillings.
Salads & Bowls: Brighten up grain bowls, quinoa, or mixed greens.
Sandwiches & Burgers: Replace traditional toppings for a tangy crunch.
Cheese & Charcuterie Boards: Add a pop of color and acidity to pair with cheeses or cured meats.

Can you make pickled red onions without a mandoline?

Absolutely! While a mandoline makes slicing faster and more uniform, a sharp knife works perfectly. The key is to slice the onions as thinly as possible to ensure they pickle evenly and absorb the brine quickly.

Pickled Red Onion Recipe

These pickled red onions are crisp, tangy, and slightly sweet perfect for tacos, sandwiches, salads, or avocado toast. With just a few pantry staples, you can prepare a jar in minutes and have a versatile topping ready in an hour.

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Prep Time 10

Cook Time 5

Rest Time 1

Total Time 1 15

Course Condiment, Side Dish

Cuisine Fusion, international

Servings 8 People

Calories 215 kcal

Ingredients

2 medium red onions thinly sliced
1 cup apple cider vinegar or white wine vinegar
1/2 cup water
2 tablespoons granulated sugar or maple syrup for a natural sweetness
1 1/2 teaspoons salt
1 clove garlic peeled and lightly crushed (optional)
1/2 teaspoon black peppercorns optional

Instructions

Slice the onions: Peel and cut the red onions into very thin slices. A mandoline works best for even slices, but a sharp knife is fine too.
Prepare the brine: In a small saucepan, combine vinegar, water, sugar, and salt. Heat over medium heat until sugar and salt fully dissolve, about 3–5 minutes. Remove from heat.
Pack the jar: Place sliced onions into a clean glass jar. Add garlic and peppercorns if using.
Pour the brine: Carefully pour the warm brine over the onions, ensuring they are fully submerged.
Rest & chill: Let the jar cool to room temperature, then cover and refrigerate for at least 1 hour before serving. The onions will be bright pink, tender, and ready to enjoy.

Notes

Notes & Tips

Vinegar swap: Try rice vinegar or red wine vinegar for a different flavor profile.
Sweetness: Adjust sugar or syrup to your taste for a tangy or sweet finish.
Storage: Keep refrigerated for up to 3 weeks. Always ensure onions are submerged in brine.
Serving ideas: Ideal for tacos, burgers, grain bowls, salads, and sandwiches.

Nutrition Information

FAQs

Refrigerated in a sealed jar, they last up to 3 weeks. Always keep them submerged in the brine.

Yes! Red wine vinegar, rice vinegar, or white wine vinegar all work well. Adjust sweetness to balance the acidity.

They are tangy and slightly sweet by default. You can add chili flakes or sliced jalapeños for a spicy version.

Yes, prepare them a day in advance for the best flavor. They taste even better after sitting overnight.

It’s not recommended, as freezing may affect their texture. Refrigeration is best.