How To Make A Blooming Onion

Here I’ll show you how to make a blooming onion in the most delicious way possible. Served with a sriracha-lime mayo dip, this is a blooming onion recipe to be reckoned with! – Hungry now?  Jump to Recipe

For those on dedicated diets, your journey unfortunately ends here. For those who can’t wait to wrap their chops around some questionable calories, welcome. And in turn, welcome to the most delicious form of fried onion you’ll ever taste. Onion rings, you were so last year.

How to make a blooming onion

I don’t know about you, but when I first laid my eyes on a blooming onion, I thought ‘how the heck do you make that!?’

But you know what, after a little research and a little more trial and error, I soon realised it seriously couldn’t be easier to make.

The key to a delicious blooming onion is finding the biggest white onion you’ve ever set your eyes on. I’m all for ‘good things come in small packages’ but in this instance bigger is certainly better.

The bigger the onion, the bigger the petals and the less chance they’re going to turn into wilted crispy bits of batter when they’re fried.

First things first, let’s get our slicing skills in order.

How to cut a blooming onion - process shots

How To Cut a Blooming Onion

  1. Cut a tiny slice off the tip of your onion, then peel off the brown outer layer of skin.
  2. Flip the onion cut side down, then begin slicing about 1/2 inch away from the root. I find it easiest to do 4 quarter slices, then about 3-4 times in between. You should be able to make about 12-16 slices, depending on the size of the onion.
  3. Flip the onion back over, then gently spread out the petals.

Easy right?

When it comes to how to make a blooming onion, it really has to be deep frying. I have toyed around with making a baked blooming onion in the past, but personally I feel it just falls a little lacklustre. Deep frying the blooming onion gives you the crispy crunchy petals you’re after.

Preparing a Deep Fried Blooming Onion Process Shots

Tips for a Deep Fried Blooming Onion

  1. Spoons and plate – When making a batter for anything that’s going to be deep fried, the mess is sometimes just too much to bare. To reduce mess when coating your onion with the dry ingredients, I find it easiest to grab a plate, place it on top of the bowl, then give it a good shake. To get in between the petals, I use two spoons. For more clarity on this then be sure to watch the recipe video down below!
  2. Shake it off – After each coating, it’s important to shake off excess flour/egg. This will ensure your blooming onion petals don’t stick together and become clumpy.
  3. Oil – Firstly, it’s important to ensure you’re using an oil with a high smoking point such as vegetable, sunflower or canola oil. Using olive oil will cause your house to turn into a cloud of smoke. Secondly, it’s crucial to ensure your oil is hot. You want to get your oil to around 350f/175c, but either way I always drop a petal in the oil to see if it sizzles before I put the entire thing in.

After that, it’s just a matter of making a dipping sauce. I actually developed this sriracha-lime mayo through default. I wanted to put a little dipping pot of sriracha mayo in the centre of the blooming onion, but didn’t have anything small enough. So, I made one using a lime! Turns out not only does a lime make the perfect dipping pot for a blooming onion, but lime goes perfectly with sriracha mayo too!

How to make a blooming onion with sriracha-lime mayo dip

Blooming onions are so great to make for a sharing appetizer, for game day, a side dish or even just because you’re darn fed up with your diet and want to devour the definition of comfort food. For me personally, it’s always the latter. Any who, let’s tuck in shall we?

How to make a Blooming Onion (Full Recipe & Video)

5 from 6 votes
How to make a blooming onion with sriracha-lime dipping bowl
How To Make A Blooming Onion
Prep Time
10 mins
Cook Time
10 mins
Total Time
20 mins

'Here I'll show you how to make a blooming onion in the most delicious way possible. Served with a sriracha-lime mayo dip, this is a blooming onion recipe to be reckoned with!'

Course: Appetizer
Cuisine: American, Game Day
Keyword: Blooming Onion
Servings: 6
Calories: 290 kcal
Author: Chris
Blooming Onion
  • 1 Large White Onion
  • 1 cup / 128g Plain White Flour
  • 1 tbsp Paprika
  • 1 1/2 tsp Salt
  • 1 tsp Cayenne Pepper
  • 1 tsp Garlic Powder
  • 3/4 tsp Oregano
  • Black Pepper, to taste
  • 2 Eggs, beaten
  • 1/2 cup / 125ml Milk
  • Oil Suitable for deep frying (Vegetable, Sunflower, Rapeseed, Canola) Approx 1 litre
  1. Make a tiny slit across the tip (not the root) of your onion and peel the brown shell away. 

  2. Place the onion with the root facing up. With a knife, begin slicing around 1/2 inch away from the root in a circular motion. You should be able to create 12-16 even slices depending on the size of your onion.

  3. Flip the onion and gently spread out the petals.

  1. In one bowl combine your flour, paprika, cayenne pepper, oregano, garlic powder and salt & pepper. In the second, combine your eggs and milk.

  2. Place your onion in the dry mix, then into the wet mix and finally back into the dry mix, ensuring you fully coat and get in between the petals each time. See recipe notes for best ways to do this.

  1. In a suitably sized pot, heat up enough oil to cover the depth of the onion. You want to get it to about 350f/175c. Drop a petal in and if it vigorously sizzles, you're good to go. Using a ladle, slowly and carefully drop in your onion root side up. Allow to fry for around 10 seconds then flip the onion over to petal side up.

  2. Depending on the size of your onion it should take around 6-10 minutes until done. You don't want to pull it out early as the batter with taste flakey/powdery, so ensure it's a deep golden colour before it comes out.

  3. Place upside down on a paper towel to drain.

Watch how to make it!

Recipe Notes

a) Coating the onion - The aim of the game is to get as little of the mix on your hands as possible, because mess. For best practice I find that placing a plate over the bowl of dry ingredients, shaking it, then flipping it upside down (holding tightly) coats the onion well. I then use two spoons to get between the petals. It's also important to shake the onion each time to get rid of excess flour/egg between the petals.


b) Deep Frying - Essentially you want to find the deepest pot you've got. If it's too shallow, when you lower the onion in the oil is gonna spill out everywhere. Not good. 


c) Serving - You can pluck out the core before or after frying. This makes room for the dipping sauce.


d) Calories - Based on a share between 6 people without the dipping sauce. The dipping sauce contains 133 calories.

Nutrition Facts
How To Make A Blooming Onion
Amount Per Serving
Calories 290
* Percent Daily Values are based on a 2000 calorie diet.

For more deep fried goodness, check out my Homemade Popcorn Chicken!

Homemade Popcorn Chicken

If you loved this recipe on How To Make a Blooming Onion then be sure to Pin it for later! Already made it? Let me know how you got on in the comments below and pick up your free ecookbook along the way!

Here I'll show you how to make a blooming onion in the most delicious way possible. Served with a sriracha-lime mayo dip, this is a blooming onion recipe to be reckoned with! #bloomingonion #onion #appetizer |


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  • Reply
    March 18, 2018 at 8:07 pm

    I love the slicing part, it looks so delicious and creative! I think our diet ends here because this is a bomb dish! 😀 Onion rings are really so old when you try to make this recipe! Amazing!

    • Reply
      March 19, 2018 at 11:22 am

      Haha yes RIP diet!!

  • Reply
    March 18, 2018 at 11:01 pm

    OK, you’ve made a blooming onion look simple, but I’m betting mine would not turn out as beautifully without practice.

    • Reply
      March 19, 2018 at 11:21 am

      You’d be surprised how easy it is to make! Plus, practicing means eating more blooming onions which I guess is never a bad thing 🙂

  • Reply
    March 18, 2018 at 11:10 pm

    That sauce looks delish! Can’t wait to try making this at home!

    • Reply
      March 19, 2018 at 11:20 am

      It’s definitely a good’n! 🙂

  • Reply
    Judy Kahansky
    March 18, 2018 at 11:52 pm

    What a great recipe! We always have a blooming onion at the annual Ribfests close to home. They are so addictive. Your recipe and post set out the process so clearly too. Thanks!

    • Reply
      March 19, 2018 at 11:20 am

      You’re right, they are SO addictive!! Thanks for the feedback, Judy 🙂

  • Reply
    March 19, 2018 at 1:39 am

    This looks and sounds seriously over-the-top delicious! Love the spices and the lime dipping “bowl” is excellent. Cheers!

    • Reply
      March 19, 2018 at 11:20 am

      It’s pretty OTT to be fair! But yep, so delish!!

  • Reply
    Cristie | Little Big H
    March 19, 2018 at 1:57 am

    Yum…. this looks so good. I can’t wait to try this at my next gathering. I’m certain everyone would be impressed.

    • Reply
      March 19, 2018 at 11:19 am

      Certainly one to impress the guests! 🙂

  • Reply
    Allison - Celebrating Sweets
    March 19, 2018 at 3:08 am

    I haven’t had one of these in years! I’ll definitely be trying this soon.

    • Reply
      March 19, 2018 at 11:18 am

      You totally should! 🙂

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