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Vibrant pickled red onions in a clear glass jar.

Pickled Red Onions

This recipe provides a quick and easy way to make delicious pickled red onions in just 5 days, perfect for adding a tangy kick to your favorite dishes. They are versatile and can be used on salads, sandwiches, tacos, and more.
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Prep Time 15 minutes
Total Time 20 hours
Servings: 4 jars
Calories: 15
Ingredients Equipment Method Notes

Ingredients
  

Main Ingredients
  • 3-4 red onions sliced thinly
  • 1 cup apple cider vinegar
  • 1 cup water
  • 1 tablespoon granulated sugar
  • 1 teaspoon kosher salt
  • 1 teaspoon whole peppercorns optional
  • 2 garlic cloves thinly sliced, optional

Equipment

  • mandoline or sharp knife
  • pint-sized jars
  • medium saucepan

Method
 

Preparation
  1. Thinly slice the red onions using a mandoline or a sharp knife and pack them tightly into clean pint-sized jars.
  2. In a medium saucepan, combine apple cider vinegar, water, sugar, and salt; bring the mixture to a boil, stirring until the sugar and salt dissolve.
  3. Pour the hot pickling liquid over the sliced onions in the jars, ensuring all onions are submerged, and add optional peppercorns or garlic slices to each jar.
  4. Seal the jars and allow them to cool completely at room temperature, then transfer them to the refrigerator and let them pickle for at least 5 days before serving.

Notes

For best results, allow the onions to pickle for the full 5 days to achieve maximum flavor. These pickled red onions can be stored in the refrigerator for up to 2-3 weeks.