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Spicy pickled red onions in a jar.

Spicy Pickled Red Onions

These Spicy Pickled Red Onions are the perfect crunchy tangy hit of flavor that is a delicious topping on so many dishes. These in particular are a little spicy thanks to an extra kick from jalapeños, and they turn a beautiful pink color. 
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Prep Time: 10 minutes
Resting time: 1 day
Total Time: 1 day 10 minutes
Servings: 10 servings

Ingredients

  • ½ cup water
  • ¼ cup distilled white vinegar
  • ¼ cup apple cider vinegar
  • 1 tablespoon granulated sugar
  • 1 teaspoon kosher salt
  • 1 medium red onion sliced ¼" thin
  • 1 garlic clove smashed
  • ½ jalapeño sliced

Instructions

  • Make the pickling liquid – In a small sauce pan, combine the water, distilled vinegar, apple cider vinegar, sugar, and salt. Warm on medium heat until the sugar dissolves. Take it off the heat and let it cool to room temperature.
  • In a large enough jar with a tight fitting lid, add all the sliced onions, jalapeño, and smashed garlic. Pour over the cooled pickling brine. Push the onions down if needed to cover them fully in the liquid. Place in the fridge. 
  • Let the pickling do its thing for at least 24 hours. Then enjoy! 

Video

Notes

  • The simplest way to avoid crying while cutting onions is to use a sharp knife. 
  • If you’re not confident in your knife skills, try using a mandoline to slice the onion. 
  • The thinner you slice your onions the quicker they’ll pickle. I like to do roughly ¼ inch thin because they pickle in about 24 hours and are thick enough to keep their texture. 
  • To get consistent slices, cut the onion in half, cut off the root and tip, then peel back the outer layer. Place the halves center down and slice against the grain (so not where the initially established opening is). 
    • If you cut the open side, you’ll get some slices that are really long and some that are really short.
  • Any glass jar with a lid works, but I specifically like to use wide mouth mason jar or weck jar for pickling. 
  • If you want the flavor of the jalapeño but not the spice, slice the pepper in half and take out the seeds and ribs before adding into the jar. 
  • Make sure the onions and jalapeños are fully submerged in the pickling liquid before storing away. 

Nutrition Estimate

Calories: 12kcal | Carbohydrates: 2g | Protein: 0.1g | Fat: 0.02g | Saturated Fat: 0.01g | Polyunsaturated Fat: 0.004g | Monounsaturated Fat: 0.001g | Sodium: 234mg | Potassium: 24mg | Fiber: 0.2g | Sugar: 2g | Vitamin A: 8IU | Vitamin C: 2mg | Calcium: 4mg | Iron: 0.05mg
Course: Condiment
Cuisine: American
Keyword: Pickled, Pickled Onions
Author: Haley