These keto pickled red onions are super easy to make and add a lot of flavor to anything you add them to. I put them on salads, protein bowls, eggs, anything! In fact, I look for excuses to add them to my meal.
How to Make Pickled Red Onions
Pickled red onions are the best: tangy, vinegar, pickled goodness with just a bit of sweetness, adding a little color and crunch to every meal. Typically, pickled red onions are made with sugar. Because this low carb pickled red onion recipe uses erythritol / monkfruit instead of sugar, it's completely keto friendly.
This recipe is from my book Dairy Free Keto Cooking. It has over 170 dairy free keto recipes and over 100 pages of resources. It contains everything you need to find ease and success living a keto lifestyle.
The Best Pickled Red Onion Recipe
I'm not sure when I first had pickle red onions, but I can tell you exactly when I fell in love with them. Back in January, during my Craveable Keto book tour, I was making a lot of trips to various Whole Foods salad bars. They have the biggest and best salad bars around, and the best thing about them, is that every single prepared item on the salad bar lists every single ingredient, so you always know exactly what you are getting. Almost every one I went to had pickled onions and I was piling them on all my salads. They were so good, BUT, they had sugar in them. I knew that as soon as the tour was over and I was home and back in the kitchen, that I wanted to make my own low carb pickled red onion recipe.
I think the reason I love these whole30 pickled red onions so much is that they have the perfect balance of bitterness from the red onion, sweetness from the erythritol, and acidity from the vinegars. When you put those three things together, you have a match made in heaven. To make them Whole30 compliant, simply omit the sweetener. I put them on everything - salads, lunch bowls, tacos, steak, eggs, etc. I am actually guilty of building an entire meal around whether or not it would go good with these pickled red onions.
Only as long as it takes to eat them! Seriously, another thing I really like about my keto pickled red onion recipe is that they will keep in the refrigerator for at least a couple of months... if you can make them last that long, that is. Just store them right in the mason jar you made them in. I have swapped out all my metal mason jar lids, for these reusable plastic lids. They are so much easier to clean, and then I can avoid the ring of rust from the metal lids. And since I store everything in mason jars, they come in really handy.
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Pickled Red Onions
- Total Time: 20 minutes
- Yield: 20 Servings 1x
- Diet: Gluten Free
The perfect blend of sweet, sour, and salty. I love to put these onions on everything from my morning eggs, to my lunch time salad, to the top of my steak for dinner.
- 1 cup red wine vinegar
- 1 cup apple cider vinegar (I use this brand)
- 2 tablespoons granular sweetener (I use this brand)
- 1 teaspoons sea salt
- 2 medium red onions, thinly sliced
- 6 cloves garlic, peeled and halved
- 1 teaspoon dried oregano leaves (I use these organic seasonings)
- Pinch of red pepper flakes
- In a saucepan over medium heat, combine the red wine vinegar, apple cider vinegar, erythritol, and salt. Bring to a light boil, stirring until the erythritol and salt are dissolved.
- Put the onions, garlic, oregano and red pepper flakes into a 32 ounce mason jar.
- Pour the liquid over top, submerging the onions and mixing in the oregano and red pepper flakes.
- Let the jar sit on the counter for 1 hour, cap and then refrigerate. (I've switched to these caps)
- Store in the refrigerator for up to 2 months. You can eat them after 2 hours, but they just get better and better the longer they are in the fridge.
- Prep Time: 15 Minutes
- Cook Time: 5 Minutes
- Category: Condiment Recipes
- Method: Marinating
- Cuisine: American
- Serving Size: 5 to 6 slices
- Calories: 10
- Fat: 0
- Carbohydrates: 1.5g
- Fiber: 0.2g
- Protein: 0.2g
Keywords: low carb pickled red onions, homemade pickled red onions, keto pickled red onions, homemade condiment recipes
We love these and have made several batches! How long/many times can you reuse the brine before pouring it out and restarting?
These turned out great. Super simple and not too expensive to make. We loved them on tacos and can’t wait to try them on other things. TY for the recipe ❤️
This is the first time I’ve ever made pickled onions and will now be a staple in my fridge. I love onions in general but this takes them to a whole new level. I made the recipe as written and they’re delicious!!! Highly recommend!
I made these the other day and my husband won't stay out of the jar! Mostly we've just been snacking on them. They will be a staple in our fridge for sure!
I am going to make these, however I have used erythritol in other pickle recipes and it has crystallized which is very unpleasant. Did you have this issue? I was thinking I would use allulose 🤷♀️.
Kyndra Holley says
It is only a small amount and it is boiled into the brine. It dissolves
How much erythritol?
Kyndra Holley says
The full recipe is at the bottom of the blog post. Sounds like maybe you are just reading the ingredient notes?