• Skip to main content
  • Skip to primary sidebar

Keto Cooking Christian

  • Recipes
    • Dinner
    • Dessert
    • Sides
    • Appetizers
    • Salads
    • Breakfast
    • Breads
    • Air Fryer
    • Slow Cooker
    • Soups
    • Sauces & Condiments
    • Recipe Collections
  • Cookbooks
  • Free Meal Plan
  • Keto
  • Shop
  • Faith
menu icon
go to homepage
subscribe
search icon
Homepage link
  • Recipes
  • Keto Cookbooks
  • Free Keto Meal Plan
  • Shop
  • How to Start Keto
  • Keto Diet Articles
  • Faith
  • About
  • Work With Me
  • Subscribe
    • Amazon
    • Facebook
    • Instagram
    • Pinterest
    • TikTok
    • Twitter
    • YouTube
  • ×
    Home / Recipes / Sauces & Condiments / Quick Pickled Red Onions

    Quick Pickled Red Onions

    March 13, 2023 by Keto Cooking Christian 4 Comments

    This post may contain affiliate links. As an Amazon Associate I earn from qualifying purchases, see Disclosure.
    386 shares
    • Share
    • Flipboard
    • Tweet
    Jump to Recipe SaveSaved!

    A little tangy and a little sweet, these Quick Pickled Onions are an easy and delicious way to jazz up the flavors of many of your favorite entrées, salads and side dishes.

    Pickled Red Onions being held up out of jar with a fork
    Easy Keto Dinners eBook 3D cover

    FREE EASY KETO DINNERS EBOOK

    DOWNLOAD NOW
    Jump to:
    • ❤️ Why You’ll Love this Pickled Red Onions Recipe
    • 🛒 What You’ll Need to Make Pickled Red Onions
    • 🔪 How to Make Quick Pickled Red Onions
    • How Long Do Red Pickled Onions Last?
    • Ways to Use Pickled Onions
    • Tips for Making Pickled Onions
    • Are Pickled Red Onions Good for Gut Health?
    • Pickled Onion Variations
    • Are Onions Ok on Keto?
    • More Keto Condiment and Sauce Recipes

    ❤️ Why You’ll Love this Pickled Red Onions Recipe

    • Pickle brine gives the onions a tangy sweet flavor
    • Great to use over a burger, salads, tacos and more
    • Takes just a handful of ingredients
    • Quick and easy to make
    Pickled Red Onions in open mason jar with peppercorns

    This recipe for sugar free pickled onions creates a bright, jewel-colored condiment that adds the prefect tangy twist to vegetables or main courses, or just enjoyed as a simple side dish.

    They only take about 10 minutes to prepare without having to fuss with any canning equipment. You just slice up your red onions, cover them in a simple homemade brine and once they've cooled, they’re ready to serve. They’re just that easy to make!

    Pickled Red Onions being held up with fork out of jar

    If you love this simple pickling method, you should also check out these easy and delicious Pickled Jalapenos and these Easy Homemade Pickles.

    🛒 What You’ll Need to Make Pickled Red Onions

    • Red onion
    • White vinegar
    • Apple cider vinegar
    • Water
    • Monk fruit/allulose
    • Kosher salt
    • Peppercorns

    *Exact measurements are listed in the recipe card below.

    🥣 Recommended Tools

    • Mandolin slicer
    • Saucepan
    • Whisk
    • Mason jar

    🔪 How to Make Quick Pickled Red Onions

    Add the vinegar, water, sweetener and salt to a saucepan and heat to a simmer and whisk until dissolved.

    water salt and sweetener in saucepan being whisked

    Slice the ends off the onion, then slice in half vertically.  Slice each half into vertical very thin slices.

    red onion being sliced on madolin

    I used a mandolin to get very thin slices.

    Tip: If you don't have a mandolin slicer, you can use a sharp knife.

    red onion sliced thin on white cutting board

    Add the onion slices and peppercorns to a mason jar.

    Tip: You can also add a smashed garlic clove for added flavor.

    sliced onions and peppercorns in open mason jar

    Then pour the pickling liquid over the top and fill up the jar. 

    vinegar being poured over sliced onions and peppercorns in open mason jar

    Add the lid on and tighten to seal.

    Pickled Red Onions with peppercorns in open mason jar

    Let the onions sit at room temperature until they have cooled, about 20 minutes or so, then place them in the fridge to chill.

    Pickled Red Onions in mason jar with lid

    Once they have cooled completely, they are ready to use.

    side view of Pickled Red Onions in open mason jar

    Store in the same jar in the fridge.

    How Long Do Red Pickled Onions Last?

    As long as you keep them chilled in the fridge in an airtight container, they will stay fresh up to two weeks. Keep in mind, the longer they sit, the softer they become.

    Pickled Red Onions in open mason jar with peppercorns

    Ways to Use Pickled Onions

    • Toppings for your favorite Mexican foods like these Keto Enchiladas or on Keto Tacos.
    • Replace regular onions with pickled ones on a burger with these Keto Buns.
    • Add a tangy twist to Coleslaw or roasted veggies.
    • Add them to any salad. They are also great added to the top of a serving of this creamy Chicken Salad.
    • Chop them up and add them to Deviled Eggs.
    • Save the juice and drizzle it over cooked leafy greens.
    Pickled Red Onions being held up with fork out of jar

    Tips for Making Pickled Onions

    • Slice the onions thinly: For pickling, you’ll want to use thin slices so that the juices will soak in quickly. For best results use a sharp chef’s knife or a kitchen mandolin. You can certainly use thicker slices, but you’ll want to let them soak for a good bit longer before serving.
    • Use the right types of vinegar: Vinegar is one of the main flavor profiles in this recipe, so you want to make sure you use one that taste good. Apple cider vinegar with white vinegar adds a nice flavor to the onions.
    • Skip the sugar: To offset the tanginess and give the onions the perfect balance, you need to add a sweetener. But that doesn’t mean you have to load them up with sugar. I use a monk fruit/allulose blend that gives them the sweetness they need without adding extra carbs.   
    • Mellow them out: If the onions you have to use are rather strong, blanch them for a couple of minutes in boiling water. Don't leave them too long of they will become soggy.

    Are Pickled Red Onions Good for Gut Health?

    Onions are a good source of vitamin B9 and folate. As far as gut healthy, pickled onions are packed with probiotics and digestive enzymes.

    Pickled Red Onions in white bowl with peppercorns

    Pickled Onion Variations

    • Spice them up: If you like them extra spicy, add a few sliced fresh jalapeno or habanero peppers. 
    • Garlicky onions: Garlic is good in almost anything. Add in a clove or two of thinly sliced garlic along with the onions before adding the brine.
    • Herby onions: Feel free to add in fresh herbs like dill, thyme or rosemary.
    • Citrus twist: Add in some fresh lemon, lime of orange zest. You can even squeeze in a little fresh citrus juice to the vinegar mixture.
    • Different types of onions: Though red onions are preferred you can use white or yellow onions instead.

    Are Onions Ok on Keto?

    Onions, in general, are low enough in carbs, they can be enjoyed in moderation on Keto or other low carb diets. ¼ of a red onion has about 4.9 total carbs and 3.8 grams net carbs.

    More Keto Condiment and Sauce Recipes

    • Bearnaise Sauce
    • Easy Alfredo Sauce
    • Easy Cheese Sauce for Veggies
    • Bang Bang Sauce
    • Buffalo Cheese Sauce
    • Homemade Pesto
    • Buffalo Wing Sauce
    20 Easy Keto Recipes Cover Thumbnail

    FREE 20 EASY KETO RECIPES EBOOK

    DOWNLOAD NOW
    Pickled Red Onions being held up out of jar with a fork

    Quick Pickled Red Onions

    A little tangy and a little sweet, these quick Pickled Onions are an easy and delicious way to jazz up the flavors of many of your favorite entrées, salads and side dishes.
    5 from 1 vote
    Author: Julianne
    Servings 8
    Print Pin
    Save RecipeSaved!
    PREP 10 minutes mins
    TOTAL 10 minutes mins

    Ingredients
     

    • 1 medium red onion
    • ½ cup white vinegar
    • ½ cup apple cider vinegar
    • ½ cup water
    • 2 tablespoons monk fruit/allulose
    • 2 teaspoons kosher salt
    • ½ teaspoon peppercorns

    Instructions
     

    • Add the vinegar, water, sweetener and salt to a saucepan and heat to a simmer. Whisk until dissolved.
    • Slice the ends off the onion, then slice in half vertically. Slice each half into vertical very thin slices. I used a mandolin to get very thin slices.
    • Add the onion slices and peppercorns to a mason jar, then pour the pickling liquid over the top and fill up the jar.
    • Add the lid on and seal with the lid. Let the onions sit at room temperature until they have cooled, about 20 minutes or so, then place them in the fridge to chill.
    • Once they have cooled completely, they are ready to use.
    • Store in the same jar in the fridge for up to 2 weeks.

    *Make sure to scroll up and read the post for substitutions, additions and helpful tips for making this recipe.

    Course Condiments
    Cuisine American
    Calories 9kcal
    Nutrition Facts
    Quick Pickled Red Onions
    Amount per Serving
    Calories
    9
    % Daily Value*
    Carbohydrates
     
    1
    g
    0
    %
    Sugar
     
    1
    g
    1
    %
    * Percent Daily Values are based on a 2000 calorie diet.

    *Nutritional data is provided as a courtesy and is accurate to the best of my knowledge. You can verify it using the nutrition calculator of your choice. All data is based on net carbs, without sugar alcohol: Swerve, Erythritol, Monk Fruit or Allulose.

    © Copyright for Keto Cooking Christian LLC. Please use the share buttons to share on social media, but please do not copy/paste the recipe.

    Rate this Recipe
    386 shares
    • Share
    • Flipboard
    • Tweet

    Filed Under: Posts, Recipes, Sauces & Condiments

    Bible verse of the day

    And this commandment have we from him, That he who loveth God love his brother also.
    1 John 4:21

    Reader Interactions

    Comments

      5 from 1 vote (1 rating without comment)

      Leave a Comment or Review Cancel reply

      Your email address will not be published. Required fields are marked *

      Recipe Rating




    1. silvia

      April 13, 2023 at 1:13 pm

      I bet some celery seed would be awesome in it too.....

      Reply
      • Keto Cooking Christian

        April 13, 2023 at 1:35 pm

        I bet it would too. 😋

        Reply
    2. Penny Vollmer

      March 20, 2023 at 12:33 pm

      Julianne, you mentioned using pickle brine/juice. Does this replace the vinegars? How much pickle brine?
      I love your recipes. They are always the best.

      Reply
      • Keto Cooking Christian

        March 20, 2023 at 3:50 pm

        Thank you so much. The brine mentioned is the vinegar mixture that is listed in the recipe card.

        Reply

    Primary Sidebar

    Julianne Walser KCC

    I'm Julianne, welcome! I offer tasty and indulgent Keto and Low Carb recipes that will never leave you feeling deprived!

    More about me →

    Footer

    AS FEATURED ON

    as featured on logo banner
    as featured on logo banner

    •SUBSCRIBE

    •COOKBOOKS

    •SHOP

    •Tim Tebow Foundation

    •ABOUT

    •CONTACT

    •PRIVACY POLICY

    • Facebook
    • Instagram
    • Pinterest
    • YouTube
    • TikTok
    • Amazon

    Copyright © 2025 Keto Cooking Christian® Registered Trademark | All Rights Reserved

    Rate This Recipe

    Your vote:




    A rating is required
    A name is required
    An email is required

    Recipe Ratings without Comment

    Something went wrong. Please try again.