Sugar-Free Pickled Red Onions

This content originally appeared here. Republished with permission.

Pickled onions are my absolute favorite condiment, something I always keep in the fridge.

Maybe it’s the tangy, sweet taste, maybe it’s the crunchy texture, or maybe it’s that beautiful pink color, but these pickled onions are a kitchen staple.

Adding pickled red onions to even the simplest dish just adds something special, and guess what else? There is no sugar added. Yup, sugar-free pickled onions do exist, and they are awesome!


pickled red onions recipe


Sugar-Free Pickled Red Onions

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Enjoy these pickled onions with eggs or on salads, tacos, sandwiches, or wraps. It's keto-friendly and Whole30-compliant, with no added sugar.
Course Condiment
Cuisine American
Keyword onion
Prep Time 15 minutes
Waiting Time 12 hours
Total Time 12 hours 15 minutes
Servings 2 cups
Calories 63kcal


  • 2 small red onions or 1 large
  • 1/2 cup apple cider vinegar preferably raw unfiltered
  • 2 tbsp lemon juice freshly squeezed, approx 1/2 lemon
  • 1 1/2 tsp sea salt
  • 1/4 tsp peppercorns
  • 1 clove garlic optional


  • Add all ingredients but the onions to a mason jar and stir well.
  • Peel and slice the red onion (I prefer to slice thinly, but feel free to do this to your preference).
  • Add the onions to the mason jar, pressing down into the apple cider mixture until they’re submerged. If you need to, top off with a little extra apple cider vinegar until all the onions are covered.
  • Mix well or cover and shake, then set it in the fridge overnight.


Quick Pickled Onions: If you need the onions in a hurry, slowly heat the apple cider vinegar before you pour it over the onions. Cover and set on the countertop for one hour.

To Store: Store in an airtight glass container for up to 2 weeks in the refrigerator.

Optional Flavor Varieties:

  • Spicy & Sweet Pickled Onions: Add a few thin slices of habanero or jalapeño and two orange segments.
  • Zesty Garlic Pickled Onions: Add 3-4 cloves of garlic
  • Mediterranean Pickled Onions: Stir in 1/4 tsp. dried oregano and 1/4 tsp. cumin
  • Mexican Pickled Onions: Substitute lime juice instead of lemon juice and a few sprigs of cilantro
  • Thai Inspired Pickled Onions: Add a dried Kaffir lime leaf or a pinch of kaffir lime powder and a small piece of peeled ginger


Calories: 63kcal | Carbohydrates: 6g | Protein: 1g | Fat: 1g | Saturated Fat: 1g | Sodium: 1752mg | Potassium: 204mg | Fiber: 2g | Sugar: 3g | Vitamin C: 14mg | Calcium: 25mg | Iron: 1mg

Please note that the nutritional information may vary depending
on the specific brands of products used. We encourage everyone to check specific
product labels in calculating the exact nutritional information.

Sugar-Free Pickled Red Onions Recipe