How to Chop an Onion

March 12, 2025
chopped onions on a wooden cutting board with kitchen knife, partially peeled onion & onions skins in the background
If you’re wondering how to chop an onion, not to fear! We’ve created this easy step-by-step guide for beginners to make the process simple and easy. Onions are a staple in many dishes, often used as a flavourful base. Hence, learning how to cut an onion the right way is a skill every cook should aim to conquer. Dive in to learn how it’s done.

How to chop an Onion

Step 1

Slice down middle of your onion so you get 2 halves. Our top tip is to then place one half back face down to minimise any onion tears!
How to chop an Onion

Step 2

Peel back the brown skin from the first half and place it flat side down on the chopping board and repeat for the other half. Then just cut off the end of each half to leave you with the white area of your onion ready to dice.
How to chop an Onion

Step 3

Hold the end of your onion carefully and begin to make cuts through, remembering to cut away from yourself. The more cuts you make the smaller the dice of your onion, so wider cuts, will give you bigger diced chunks. Be careful not to cut completely through, you need to keep the back end intact where you are holding the onion.
How to chop an Onion

Step 4

You then cut horizontally across the onion, again the more cuts you make the finer your dice will be.
How to chop an Onion

Step 5

Make a claw with your fingers and place them down on the onion, making sure your fingernails are well away from the blade. It is your knuckles which should be in contact with the knife, not fingers. Then with a soaring motion cut through your onion.
How to chop an Onion

Step 6

Continue to cut through all the onion, not forgetting your other half, until it is all beautifully diced and ready to cook with.

Watch The Video To See The Technique In Action

Put Your Onion Chopping Skills To The Test


Put your onion chopping skills to the test with this delicious and easy Mini Mince & Spring Onions Stand ‘N’ Stuff™ Tacos recipe, featuring diced onion.

Get Ready To Make Some Noise With Old El Paso

Whether you’re learning to cook for yourself or making something for family or someone special, knowing how to chop an onion is sure to help speed up the process. Once you’ve aced our Mini Mince & Spring Onions Stand ‘N’ Stuff™ Tacos, why not check out some more of our easy and quick recipes here! Plus, don’t forget to share your creations with us on social media.