When you already know the way to minimize an onion the proper means, your mealtime prep might be an entire lot simpler! This tutorial will present you the way to slice and cube onions for all of your cooking wants.

Overhead view of sliced onions cooking in skillet

Earlier than you grasp the way to make an ideal quiche or do-it-yourself pasta from scratch, it’s essential to know the basics of cooking. And there’s nothing extra elementary than knife abilities.

Minimize an Onion

Realizing the way to use a knife correctly is a vital a part of being an ideal cook dinner. The most effective methods to hone your knife abilities is to learn to minimize an onion utilizing correct approach.

It could appear easy, however it may be surprisingly tough in the event you don’t know what you’re doing.

(Want some concepts for utilizing your onions? Strive my Home made French Onion Dip or Onion Tart!)

Prepping an Onion

Very first thing’s first: you’ll must take away the pores and skin and ends from the onion earlier than you get began.

An onion has a stem finish and a root finish. The foundation finish is the top with the dry brown roots popping out, whereas the stem finish is the top that faces up when the onion is within the floor—it’s the place the inexperienced sprouts develop.

Place the onion on a reducing board on its aspect, then minimize 1/2-inch from the stem finish and a smaller slice—about 1/8-inch—from the basis finish.

Flip the onion so the stem finish is on the underside and the basis finish is dealing with up in the direction of you. Minimize the onion in half from root to stem.

With the onion halved, it’s now simple to peel off the pores and skin and discard it. You’ll wish to discard not solely the papery pores and skin on the surface, but in addition any layers beneath that really feel leathery and skinny—these layers might be robust and troublesome to chew.

Skillet on stovetop with sliced onions and wooden spoon

Slice an Onion

  1. Step 1 – Place one of many halves flat side-down in your reducing board and begin slicing crosswise to kind half moons. 
  2. Step 2 – Proceed slicing till you attain the top of the onion.
  3. Step 3 – Repeat with the opposite half.

Cube an Onion

  1. Step 1 – Place one of many halves flat side-down in your board and make angled lengthwise cuts from the stem finish in the direction of the basis finish—however don’t minimize by means of the basis finish.
  2. Step 2 – Maintain the basis finish and slice the onion crosswise beginning with the stem finish and dealing your option to the basis finish. Discard the basis finish.
  3. Step 3 – Repeat with the opposite half.
Sliced onions in a pan, for a guide on how to cut an onion.


  • Leaving the basis finish partially intact will maintain the onion collectively as you narrow, making the method so much simpler!
  • The sharper the knife, the higher! It makes it a lot smoother to chop.

wood cutting board

Instruments to Use

  • Chef’s knife – The sharper the higher!
  • Reducing board – I like to recommend utilizing a non-slip board once you’re reducing onions.

Stack of homemade onion rings on a piece of butcher paper.

Different Strategies


For those who’re making onion rings, you’ll must take away the basis and stem ends, then peel the onion. 

To maintain the onion from rolling on the reducing board, slice a skinny sliver from one aspect. Place that aspect down on the board, then minimize the onion into rounds in your required thickness.


If you wish to minimize your onion into wedges, comply with the steps for dicing, however cease after making the angled lengthwise cuts.

Storage Suggestions

For those who’re not going to make use of all of a minimize onion instantly, retailer it in an hermetic container or wrap it tightly in plastic wrap and hold it within the fridge. Minimize onions will last as long as every week when saved correctly. 

Continuously Requested Questions

Do you narrow the basis or stem of an onion?

Leaving a part of the basis finish on the onion will assist it maintain collectively once you slice it. One of the crucial widespread errors folks make with reducing onions is chopping off each the stem and the complete root finish, which makes the onions slip once you minimize them.

How do you forestall tears when slicing onions?

Strive slicing the onion close to an open window so the fumes don’t irritate your eyes, or activate the fan in your kitchen and minimize the onion close by. When you have time, you may also freeze the onion for a couple of minutes. 

What’s the greatest knife for reducing an onion?

The very best knife for reducing an onion is a pointy chef’s knife. It should make slicing by means of the layers of the onion a lot simpler and quicker; as well as, a pointy knife could make you much less prone to cry once you’re reducing.