Pickled Red Onions

Course: Condiment
Cuisine: American
Prep Time: 10 minutes
Cook Time: 10 minutes
Total Time: 15 minutes
Servings: 16 servings
Calories: 14kcal
Author: Lord Byron's Kitchen
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  • 3 large red onions, thinly sliced
  • 2 cups water
  • 1 cup vinegar
  • 4 tablespoons sugar
  • 4 teaspoons salt


  • In a large stock pot, bring the water, vinegar, salt, and sugar to a low boil.  Be sure the sugar has completely dissolved by whisking the mixture together.
  • Remove from heat.  Add the onions and stir to submerge.  Set aside.
  • In the meantime, prepare 4 250 ml jars by washing them thoroughly with hot, soapy water. Be sure to rinse the jars until the soap residue is gone. Set the jars aside. Next, boil a kettle full of water. Place the seals and jar rings into a large bowl. Pour the boiled water over top and let them sit.
  • Using a tongs, fill the prepared jars with the onion slices. I like to use a metal funnel to avoid any of the onion coming into contact with the rim of the jar. This will help to create a better and safer seal. Fill the jar so that only 1/2 inch of head space remains. Ladle the vinegar and water mixture into the jars to cover hte onions. Remove the funnel and place a hot, sterilized seal on the jar. Screw on the lid until just snug. Be careful! The jar will be hot! Use a kitchen towel to hold the jar in place as you screw on the lid.
  • Place the jars on a kitchen towel where they will not be disturbed. As the jars cool, you’ll hear a popping sound. This is the hot liquid and air in the jar cooling down and contracting. This will create an air-tight seal and will allow you to store your onions for future consumption.
  • For best results, I recommend allowing the jars to sit undisturbed for at least 12 hours. With a damp cloth, wipe down the jars, re-tighten the lids, and store in the fridge.  Onions will last for up to 3 months.


One serving is equal to 1/4 cup.


Calories: 14kcal | Carbohydrates: 3g | Protein: 0g | Fat: 0g | Saturated Fat: 0g | Cholesterol: 0mg | Sodium: 583mg | Sugar: 3g | Calcium: 0.2%