Prep Time: 10 minutes
Cook Time: 5 minutes
Pickling Time: 20 minutes
Total Time: 35 minutes
Yield: 1 pint jar (approximately 8 servings)
Difficulty Level: Easy
Cuisine: American
Ingredients
- 2 medium red onions, thinly sliced
- 1 cup white vinegar
- 1 cup water
- 1 tablespoon granulated sugar
- 1½ teaspoons kosher salt
Optional Flavor Additions
- 1 garlic clove, smashed
- 1 teaspoon black peppercorns
- ½ teaspoon red pepper flakes
- 1 bay leaf
- ½ teaspoon mustard seeds
- Fresh dill sprigs
Equipment Needed
- Sharp knife or mandoline slicer
- Medium saucepan
- Measuring cups and spoons
- Clean glass jar with lid
- Cutting board
Instructions
Step 1: Prepare the Onions
Peel the red onions and slice them as thinly as possible. Thin slices absorb the pickling liquid more quickly and create the best texture. Place the sliced onions into a clean glass jar or heat-safe container.
Step 2: Make the Pickling Brine
In a medium saucepan, combine the white vinegar, water, sugar, and salt. If using optional flavor additions such as garlic, peppercorns, or bay leaves, add them to the saucepan as well.
Place the saucepan over medium heat and stir until the sugar and salt completely dissolve.
Step 3: Heat the Mixture
Bring the mixture to a gentle simmer. This process usually takes about 3 to 5 minutes. Avoid boiling vigorously, as a gentle simmer is sufficient for dissolving the ingredients and blending the flavors.
Step 4: Pour Over the Onions
Carefully pour the hot pickling liquid over the sliced onions. Ensure all onion slices are submerged in the brine. If necessary, gently press them down with a spoon.
You will notice the onions beginning to soften and change color almost immediately.
Step 5: Cool and Pickle
Allow the jar to cool at room temperature for approximately 20 minutes. During this time, the onions will begin absorbing the tangy flavors of the brine.
For the best flavor, refrigerate for at least 30 minutes before serving. However, waiting several hours or overnight will result in even more flavorful onions.
Step 6: Serve and Enjoy
Use pickled red onions as a topping or garnish for a variety of dishes. Their bright acidity complements rich, savory foods particularly well.
Serving Suggestions
Pickled red onions pair wonderfully with:
- Tacos and burritos
- Burgers and sandwiches
- Pulled pork
- Grilled chicken
- Barbecue dishes
- Grain bowls
- Rice bowls
- Avocado toast
- Salads
- Roasted vegetables
- Mediterranean platters
Their crisp texture and tangy flavor help balance heavier dishes while adding a fresh and colorful finish.
Tips for Success
Slice Evenly
Uniform slices ensure consistent pickling and texture. A mandoline slicer can help achieve thin, even slices quickly.
Use Fresh Onions
Fresh, firm red onions produce the best flavor and crunch. Avoid onions that feel soft or have sprouted.
Adjust Sweetness
If you prefer a sweeter pickle, increase the sugar to 2 tablespoons. For a more tangy result, reduce the sugar slightly.
Experiment with Flavors
Add spices and herbs to customize the flavor profile. Garlic, peppercorns, chili flakes, and fresh herbs all work beautifully.
Give Them Time
Although the onions become tasty after 30 minutes, they develop a richer and more balanced flavor after several hours in the refrigerator.
Storage Instructions
Store pickled red onions in an airtight container or sealed glass jar in the refrigerator.
They will remain fresh for up to 3 weeks when properly refrigerated.
Always use a clean utensil when removing onions from the jar to maintain freshness and prevent contamination.
This recipe is intended for refrigerator pickling and is not designed for long-term shelf-stable canning.
Frequently Asked Questions
Can I use apple cider vinegar?
Yes. Apple cider vinegar creates a slightly sweeter and fruitier flavor. It is an excellent substitute for white vinegar.
Why did my onions turn bright pink?
This is completely normal. The natural pigments in red onions react with the acidic vinegar, creating a vibrant pink color.
Can I make them less sharp?
If you prefer a milder flavor, soak the sliced onions in cold water for 10 minutes before pickling.
How long should I wait before eating them?
They are ready after about 30 minutes, but the flavor improves significantly after several hours or overnight.
Nutritional Benefits
Red onions contain antioxidants and beneficial plant compounds. Because this recipe uses minimal sugar and no oil, it remains a light and healthy condiment option.
Pickled red onions add flavor without significantly increasing calories, making them a smart addition to balanced meals.
Nutrition Information
Serving Size: Approximately 2 tablespoons
Calories: 12
Carbohydrates: 3g
Protein: 0g
Fat: 0g
Saturated Fat: 0g
Cholesterol: 0mg
Sodium: 120mg
Fiber: 0.5g
Sugar: 2g