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How To Dice An Onion

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Learn how to (safely) dice an onion with this quick tutorial! 

Learn how to safely dice an onion with this easy video tutorial! |

Hey guys! We’re back today with a new How-To Tuesday video today that I’m pretty excited about, because I think it’s one that you may actually end up using the most in your kitchen. And, because it sounds like this topic has been the cause of a few too many runs-to-grab-Band-Aids in the past, and I want to keep those precious fingers of yours nice and safe in the kitchen in the future. ?

We’re talking about how to dice an onion!

Make that, how to properly and safely dice an onion.

Because there are definitely all sorts of ways that you can hack into an onion and eventually end up with a picture-perfect dice. But if you want to maintain a good grip on the onion and keep your knife from slipping and get a nice controlled dice on every single piece of that onion (even those last few tricky bits), there is a basic method that will help you successfully and safely dice an onion every time. Here it is!

How To Dice An Onion | 1-Minute Video

How to Select An Onion:

In general, you want to look for fresh onions at the market that:

  • have thin skin and feel firm (the firmer the better)
  • have even color on the outside (yellowish spots and bruises are usually bad)
  • do not have sprouts growing out of the end (this is an indication they’re past their prime)

How To Store Onions:

Once you’ve picked the best onions you can find, keep them in a cool, dry place away from light. This simple technique should keep good onions at their best for at least 3-4 weeks. As always, give them one more looking-over before you use it, just to be safe.

How To Cook Onions:

Where to even begin??? Onions are at the heart of almost every savory dish – one of the many reasons I love them so much. Here are my favorite ways to enjoy this small-but-mighty ingredient:

  • Eat Them Raw: A few slivers of red onion give salads a nice little bite, as well as a pretty pop of color – it’s an absolute go-to for salads in my book!
  • Sauté Them: The best everyday way to prepare onions. Essential for stir-frying, and countless sauces!
  • Caramelize Them: To make classics like French Onion Soup, this is a technique I use all the time. So good.
  • Roast Them: Not just for Thanksgiving anym0re, roasted onions make delicious sides and can bring your sauces up a notch.

Favorite Onion Recipes:



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How To Dice An Onion

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  • Prep Time: 2 minutes
  • Total Time: 2 minutes
  • Yield: 1 -2 servings 1x


Learn how to (safely) dice an onion with this quick tutorial!


  • 1 onion

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21 comments on “How To Dice An Onion”

  1. Thank you for the video! I’ve never been able to properly dice an onion before (I know, how noob of me!).

    Charmaine Ng

  2. Great tips! Thanks for sharing =)

  3. Thank You !!

  4. I’ve always despised onions because I’ve never known how and where to cut them. I can’t wait to use one in a recipe now and try this technique, thank you!

  5. I’ve seen this before and tried it.  My go-to technique now is to slice the onion and then do the dicing cuts on the slices.  Maybe not quite as fast, but it definitely works for me.  For thin-slicing onion, I bought a mandoline, and and it works really well (slicing onions is how I managed to badly slice a finger last time it happened).

  6. Ok…that’s about a million times easier than I’ve ever done it. Thanks so much for posting this!!

  7. Very nice!

    – and – Congratulations on the engagement! You two look SO nice together :)

  8. Thank you. I learned something, i.e. Leave the root end on until diced!! Great.

  9. Just a few words to say I have been very impressed with your so easy way to cut a onion! Thank you,

  10. Awesome! Thanks for the tip. I am always afraid of slicing and dicing my fingers instead of the onion.

  11. I just showed my college-age son how to do this over Christmas break so he could make Philly Steak Sandwiches. The only part I do differently is cutting the horizontal layers first and doing so with my palm flat across the top of the onion to stabilize it. Great how-to!

  12. Thank you! My way takes longer and I never have equal sized pieces.  Just showed my 10 year old son too who is learning kitchen/cooking skills. 

  13. Glad to see the new generation learning to do what i’ve done for years’

  14. No, too much time wasted. Use onion Wizard

  15. Great video – guess what – I’ve been doing it wrong all these years!

  16. I’m a 68 year-old man. I do all the cooking for two, sometimes three people, occasionally a small dinner party. I’ve cut up thousands upon unknown thousands of onions.
    Today I finally learned how to do it correctly.
    Thank you.

  17. Just wondering why horizontal cuts are needed, since the onion itself is already “cut” horizontally. I’ve been using this method for years and have never made horizontal cuts, and it works perfectly. One less step.