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Do you love crispy onions? Then you will love air fryer onions. Crispy and yummy and perfect for serving over your summer hot dogs. Plus, it can save you the effort of getting a pan out to fry your onions.

Onions in air fryer, don’t take long at all and you can reduce the calories thanks to the air fryer and a spray bottle.

Air Fryer Onions
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Onions In Air Fryer

When you are stood there, queueing for your hot dog at a hot dog stand, what kind of toppings do you choose?

I love loads of fried onions (the more the better) along with plenty of ketchup and mustard. Whilst the rest of our family is just a bit of ketchup and they are done!

The worst thing though, is where I like to get them (30 mins from where we live) there is a big seagull problem and they always want to steal the hot dogs, I panic and cover myself in ketchup. Then if you can visualise me in a white top and you can imagine the state of me!!!

But back to those onions in air fryer. If like me you love a hot dog with onion, then these fried onions are perfect. I recently shared my air fryer hot dogs recipe and how long to cook hot dogs in air fryer, and it included the onions, but what if you don’t just want fried onions for hotdogs?

That is when this air fried onions recipe is perfect for you. You can use it alongside our air fryer ground beef recipe (mince here in the UK) our air fryer lasagna, or even our air fryer chilli con carne.

Then you don’t have to get the frying pan out first, before cooking an air fryer recipe.

Can You Air Fry Onions?

Yes, you can air fry onions and they are so easy too and also less calories compared to frying onions in a frying pan.

You see to air fry onions you just need a few sprays of extra virgin olive oil, though make sure you don’t use fry light (read all about frylight in air fryer here) and this brings the calories down but also makes the onions lovely and crispy.

Should You Fry Onions In Oil?

Its common to fry onions in oil for that wonderful crispy texture. But if you are on a diet and want to cut the calories, when you air fry onions, they require a lot less oil.

But to answer your question, to fry onions you do need oil otherwise they will be very dry and wont go crispy.

Air Fryer Whole Onion

Have you ever wanted to cook a whole onion in air fryer? Then let me introduce you to the best of the best of the air fryer whole onion, also known as an air fryer bloomin onion.

An air fryer in a crispy batter and the perfect fun appetiser for your next night in or party.

Air Fryer Caramelized Onions

If you love a more caramelize onions in air fryer look, then what you can do is add some melted butter to the onions and then air fry them. Then air fry onion in the same way and keep air frying until you are happy with the level of brownness.

Of course when you brown onion in air fryer, you can always add extra cooking time until it is to your preferred doneness as we always prefer them differently.

Onion Air Fryer Ingredients

How To Air Fry Onions?

Onion – We used one white whole onion. You can use one medium one like we did, or some small ones.

Spray – Then we used extra virgin olive oil spray, so that we could evenly coat the onion and make sure it helped the onions in the air fryer get crispy.

Seasonings – This is optional, but you can add some salt and pepper, or a favourite seasoning, to flavour your onion with.

How To Air Fry Onions?

  • Prep. Peel and slice your onion into strips.
  • Cook. Tip the sliced onion into the air fryer basket and spread them out. Spray the tops with olive oil spray and air fry at 200c/400f for 3 minutes.
  • Spray. Shake the onions, spray again and then continue air frying onions for further 6 minutes at 180c/360f or until they are crispy to your liking.

Now that is how simple it is to cook onions in air fryer, and you just need to decide how you are making the onions into a meal.

How Long To Cook Onions In Air Fryer?

For onions in air fryer we recommend 9 minutes cooking time. This may seem a lot for air fryer fried onions, but this is also to make them nice and crispy. Plus, you’re not stood over them like you are with a pan of onions.

Sam & Doms Top Tips For Success

For fried onions in air fryer, we recommend that you use a bottle filled with extra virgin olive oil. Or you get an already prepared bottle like this one we recommend and use a lot in our air fryer. It avoids a damaged air fryer plus it makes your air fryer food so crispy.

Get Air Fryer Confident

It can be daunting when you first get an air fryer, you land on a recipe site and then think now what?

Well, we love helping new people to the air fryer as we remember the struggle ourselves when got our first air fryer back in 2012. That is why we have put together these useful resources just for you.

Sign up for our 100% free air fryer kickstart course. It’s a 5 day free mini series delivered by email and teaches you the basics of air frying. Get it here – its free!

We also have the air fryer bucket list which is what we recommend people follow after our kickstart course. Its 100% free too and walks you through the 30 most popular air fryer, bucket list worthy recipes. Sign up for it here!

Prefer the visual then check out our You Tube Channel – with more than 750 step by step kitchen gadget recipes. Don’t forget to hit the subscribe button to get access to new videos as they happen!

We also have two amazing air fryer cookbooks that are perfect for learning the air fryer. With step by step photos for key techniques and more than 140 recipes in each book. The Complete Air Fryer Cookbook was our first and has sold over 150,000 copies worldwide, and our new baby is Air Fryer Easy Everyday.

More Air Fryer Resources

Air Fryer Onion Recipes

Plus, don’t forget your sides. Our favourites include air fryer pull apart bread rolls, air fryer frozen French fries, air fryer homemade chips, air fryer breakfast potatoes or our favourite, air fryer hamburgers which is perfect for having with your hotdogs and onions.

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This air fryer onion recipe is an updated post and was originally shared with you in 2021.

Learn all about air fryer onions below, note you can print it out with or without photos, adjust servings, or click between metric and imperial depending on where you are in the world.

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5 from 4 votes

Air Fryer Onions

Do you love crispy onions? Then you will love air fryer onions. Crispy and yummy and perfect for serving over your summer hot dogs. Plus, it can save you the effort of getting a pan out to fry your onions.
Prep Time: 5 minutes
Cook Time: 9 minutes
Total Time: 14 minutes
Servings: 2
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  • Peel the onion and slice into thin strips.
    How To Air Fry Onions?
  • Place the sliced onion into the air fryer basket and spread it out.
    How To Air Fry Onions?
  • Spray the tops with olive oil spray. Air fry at 200c/400f for 3 minutes.
    How To Air Fry Onions?
  • Shake the onions and spray again with olive oil spray. Air fry onions for a further 6 minutes at 180c/360f or until crispy to your liking.
    How To Air Fry Onions?


Please note This air fryer onion recipe was tested in our Cosori air fryer basket. (its this one) Air fryers vary so adjust if necessary, depending on the quality of your air fryer. Or consult the temperature test on page 18 of The Complete Air Fryer Cookbook.


Calories: 22kcal | Carbohydrates: 5g | Protein: 1g | Fat: 0.1g | Saturated Fat: 0.03g | Polyunsaturated Fat: 0.01g | Monounsaturated Fat: 0.01g | Sodium: 2mg | Potassium: 80mg | Fiber: 1g | Sugar: 2g | Vitamin A: 1IU | Vitamin C: 4mg | Calcium: 13mg | Iron: 0.1mg
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About Sam & Dom

Hi! I am Sam and along with my chef hubby Dom we love sharing with you easy everyday recipes using kitchen gadgets. We are also the authors of The Complete Air Fryer Cookbook, an amazing air fryer cookbook filled with 140+ everyday air fryer recipes.

Beyond the air fryer we also love the instant pot, slow cooker, soup maker, ninja foodi, pie maker and several other kitchen gadgets.

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Recipe Rating


  1. 5 stars
    Absolutely Perfect!!
    Loved them on liver with bacon as well, totally amazing ???? ❤???? keep up the awesome work.

  2. 5 stars
    I love doing these for my hot dogs and used to do them in a pan but this recipe was great and i added some butter to them afterwards.

  3. 5 stars
    Was just wondering how to cook an onion for fried onions and these were perfect,will need to adjust my timings slightly as they were under done but ia m using a one person air fryer.