Quick Pickled Red Onions Recipe
Introduction
Quick pickled red onions add a bright, tangy crunch to any dish. They are easy to prepare and ready to enjoy in less than an hour, making them a perfect condiment for salads, tacos, or sandwiches.

Ingredients
- 2 large red onions, very thinly sliced (about 4 to 5 cups sliced)
- 2 cups (480 ml) apple cider vinegar or distilled white vinegar
- 1 cup (240 ml) water
- 2 tablespoons granulated sugar
- 1 tablespoon kosher salt
- 1 teaspoon black peppercorns
- 4 cloves garlic, smashed
- ½ teaspoon red pepper flakes (optional, for a little heat)
Instructions
- Step 1: Thinly slice the red onions using a sharp knife or a mandoline for paper-thin slices. Pack the slices tightly into a clean 2-quart glass jar or divide them between smaller jars.
- Step 2: In a small saucepan or microwave-safe bowl, combine the vinegar, water, sugar, kosher salt, black peppercorns, smashed garlic cloves, and red pepper flakes if using. Heat gently until the sugar and salt dissolve, about 1 to 2 minutes on the stove or 30 to 45 seconds in the microwave, without boiling. Stir well.
- Step 3: Pour the warm brine over the sliced onions, ensuring they are fully submerged. Use a spoon or chopstick to press the onions down gently.
- Step 4: Let the jar cool to room temperature for 20 to 30 minutes, then seal and refrigerate.
- Step 5: Allow the onions to chill for at least 15 to 30 minutes before serving. For best flavor, let them sit overnight.
Tips & Variations
- Use a mandoline slicer for evenly thin onions that pickle quickly and evenly.
- Add fresh herbs like thyme or dill to the brine for extra flavor.
- For sweeter pickles, increase the sugar by 1 tablespoon.
- Swap apple cider vinegar with red wine vinegar for a different tang.
Storage
Store the pickled onions in an airtight jar in the refrigerator. They will keep well for up to 2 weeks. Reheat is not necessary; serve them cold or at room temperature as a zesty topping.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
How long do quick pickled onions last?
They last about 2 weeks refrigerated. Always use clean utensils to avoid contamination.
Can I use other types of onions?
Yes, white or yellow onions work, but red onions have the best color and sweetness for pickling.
PrintQuick Pickled Red Onions Recipe
Quick Pickled Red Onions are a tangy and flavorful condiment that can brighten up a variety of dishes. Thinly sliced red onions are soaked in a warm brine made from apple cider vinegar, water, sugar, salt, and aromatics, then refrigerated until perfectly crisp and zesty. Ready in under an hour, these pickled onions add a delicious pop of acidity and crunch to salads, sandwiches, tacos, and more.
- Prep Time: 10 minutes
- Cook Time: 5 minutes
- Total Time: 40 minutes
- Yield: 8 servings 1x
- Category: Condiment
- Method: No-Cook
- Cuisine: American
- Diet: Vegan
Ingredients
Pickled Onions
- 2 large red onions, very thinly sliced (about 4 to 5 cups sliced)
- 4 cloves garlic, smashed
Brine
- 2 cups (480 ml) apple cider vinegar or distilled white vinegar
- 1 cup (240 ml) water
- 2 tablespoons granulated sugar
- 1 tablespoon kosher salt
- 1 teaspoon black peppercorns
- ½ teaspoon red pepper flakes (optional, for a little heat)
Instructions
- Slice Onions: Thinly slice the red onions using a sharp knife or a mandoline for paper-thin slices. Pack the sliced onions tightly into a clean 2-quart glass jar or divide among smaller jars as desired.
- Prepare Brine: In a small saucepan or microwave-safe bowl, combine apple cider vinegar, water, sugar, kosher salt, black peppercorns, smashed garlic cloves, and red pepper flakes if using. Heat gently until sugar and salt dissolve, about 1 to 2 minutes on stovetop or 30 to 45 seconds in microwave. Avoid boiling.
- Pour Brine Over Onions: Pour the warm brine over the sliced onions, making sure the onions are completely submerged. Use a spoon or chopstick to press the onions down to keep them under the liquid.
- Cool and Seal: Allow the jar to cool to room temperature, about 20 to 30 minutes, then seal with a lid and refrigerate.
- Chill and Serve: The pickled onions are ready to enjoy after chilling for 15 to 30 minutes but develop the best flavor after a few hours or overnight in the refrigerator.
Notes
- Use a mandoline for evenly thin onion slices to improve texture and pickling.
- Adjust sugar and salt levels to taste depending on desired sweetness and saltiness.
- Red pepper flakes are optional and add a mild heat; omit if preferred.
- Store pickled onions in the refrigerator for up to 2 weeks.
- For clearer brine, you may strain out peppercorns and garlic cloves after pickling if desired.
Keywords: quick pickled red onions, pickled onions, easy pickles, condiment, tangy onions, apple cider vinegar pickles, vegan pickles

