Marinated Onions MAGIC ELIXIRS (TM)

I love a magic elixir–a special sauce or bit of magic that turns ordinary food into extraordinary. In my circle, I’m a little famous for the bowl of marinated red onions on my kitchen counter…which is amusing, because how could I have known these onions would start a movement? From my Instagram stories you may know that I prize a beautiful entrée salad, and every entrée salad I make includes a bit of this oniony goodness. And there isn’t a simpler recipe.

I marinate my red onions in a high quality olive oil, red wine vinegar, and oregano. I leave them on my counter uncovered in a little ceramic dish to use every day on my eggs, in a hamburger, in a salad, or in a marinated entree. Daily I get reports on other creative ways people enjoy them–and my own children eat them right out of the bowl.

Make enough to use over two days, and if after two days you haven’t used them up, use the oil olive oil to make a salad dressing, sauce up the onions and enjoy them, or chop them up and put them in a chicken salad. They stay fresh about two days on the countertop. You might be asking yourself: why not put them in the refrigerator? I don’t, because when the oil solidifies, the magic is gone. After Heroine Chicken these simply delicious dish enhancers are my most talked about recipe, and deserve their own blog post–so let me know how you use yours!  They will perk up just about every savory  dish you make.

Marinated Red Onions



  • 1 small red onion
  • ¾ cup olive oil
  • 1 Tbsp dried oregano
  • 1 Tbsp red wine vinegar
  1. Thinly slice the red onion and place in a low bowl.
  2. In a separate bowl, stir the olive oil, red wine vinegar and dried oregano together to combine well. Pour the mixture over the onions, making sure they are submerged.
  3. Let sit on counter at room temperature to marinate for at least an hour. Keeps for two days unrefrigerated.

Marinated Onions MAGIC ELIXIRS™ are a Whole30 Game Changer and a counter staple for me and just about anybody that follows me. If I have one dish that’s a bit of a revolution, I would say these marinated onions are it! I never imagined that such a simple condiment could unilaterally make such a hit with onion lovers and haters alike. I receive dozens of messages a day from people raving about them. Here are some of my favorites…

“I have yet to find a savory food that these don’t go on.

“They rock my world! Like, I’m obsessed and my husband thinks I’m having an affair with them.”

My kids ask “Can you put that on everything?”

“They work on everything. I never let myself run out of them. At work they are a HUGE hit with everyone too.”

“Magic in my mouth!”

“The secret weapon that you never knew you needed!”


132 thoughts on “Marinated Onions MAGIC ELIXIRS (TM)

  1. love almost all things pickled, red onions have a nice zing to them too

  2. Love, love, love your marinated onions and this is just the perfect bowl, it’s so lovely!

  3. Those onions are thee best!! Idk how many times I’ve made them in the last 2 months!

    1. Did you use the recommended oil? If not what brand did you use? Thanks in advance if got respond.

      1. There are so many wonderful ones… But you can look on my shop Whole30 page and it gives you some suggestions

  4. Marinated onions are our new kitchen staple! My kids love them!

  5. I made these and quickly realized that I don’t prefer oregano. Do you have an idea of a different spice that I could use instead? Thanks. And I love your IG Stories and recipes!

    1. I made them with fresh thyme last night. I like them!

      1. love it ..I’m a girl that likes fresh herbs but when things are going to stay on the counter for three days dried is actually better for this –

      2. How wonderful… I like fresh but for this – I prefer dried just in terms of keeping good longer on the counter

    1. Thank you so much for the inclusion. Things like this really make a difference to me!

    1. Thank you! We use them on almost everything over here and I’m delighted that others love them as much as i do!

  6. Ars all red onions so strong? Made the marinated red onions today. Maybe my onion was too large. Need some a little less overpowering.

    1. Here’s my thought, your onion wasn’t submerged in the marinade. The proportions are extremely important and if they’re not submerged, then they’re not being marinated, hence the strong onion flavor. My suggestion is to start again and use one thinly sliced small onion, half a medium or quarter of a large onion. Message me on Instagram and i can send you some pix.

      1. Thank you! Will try it

    1. That’s how we get though many of our days too!

    2. Nice

    1. Yay ❤️❤️❤️

  7. No Salt in the marinade? Making them tonight!

    1. No salt in the marinade

  8. I can say that I’ve certainly increased my olive oil purchase since this has become a weekly staple. I have to say that I’ve always used balsamic vinegar because that’s what I had on hand and I just recently used pomegranate vinegar (delish). Also, I like to mix up my herbs, sometimes oregano, herbes de Provence, or thyme…all yummy 😋. Thanks for the inspiration Teri.

    1. have fun!!

  9. Love Teri and all her things! Does anyone know the measurements of the onion bowl she sells?

    1. Hi, it’s Teri! The bowl fits one batch of onions perfectly…and that’s what it’s intended for. Hope that helps!!

  10. Hi Teri,
    Quick question on the marinated onions, i live in the Bahamas and room temp here is kind of warm, we tend not to leave our AC on in the kitchen 24/7 so room temp can be in the mid to high 80’s for us some days. Do you think this will be an issue for the marinated onions and cause them to go bad faster? I have been dying to try them but concerned about leaving them on the counter.
    Thanks for your wonderful blog!

    1. Well I would absolutely make a batch and see what happens… Most people eat him up in a day

    1. ❤️❤️❤️

    2. I’m so delighted to be named in this article…

    3. Yes !!!

  11. Hi Terri, went to make your marinated onions today and realized I have no red wine vinegar! Could you use white wine vinegar or balsamic vinegar in it’s place?

    1. I would suggest getting the red wine vinegar

  12. Do you add salt?

    1. I don’t… Everything I add them to already has salt so it’s just not necessary… But if you want to go ahead

    1. love this ..Thanks for tagging me

    2. love this ..Thanks for tagging me.

  13. Can you reuse the oil? Add another onion with out starting from scratch?

    1. Thanks for asking… No. You can use it for salad dressing or use it as a marinate on any protein

    1. love this

  14. Do you have to leave them in an open bowl or can you use a container with a lid?

    1. I leave the pool open on my calendar. The marinade covers the onions so I don’t have any problem with anything getting in there

    2. I meant to say counter, I always leave mine on the counter uncovered. The marinade it self covers the onions so I don’t have any problem with anything getting in there

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Location nocrumbsleft/Chicago, IL E-mail teri@nocrumbsleft.net Hours I'm happy to provide all my content for free. We do participate in Affiliate advertising programs, including Amazon, to earn a percentage of all products linked through my website.
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