How to Dice an Onion in Under a Minute
A perfectly diced onion is the foundation of countless recipes, from soups and stews to curries, sauces and stir-fries. Yet for many home cooks, onions remain one of the most time-consuming ingredients to prepare.
However, with the right technique and a razor-sharp kitchen knife, you can dice an onion in under a minute and without any tears! Professional chefs often rely on what’s known as the horizontal-vertical-horizontal dice method – a simple and efficient approach that delivers consistent, uniform results every time.
Why Onion Dicing Technique Matters
Many people approach onion preparation with unnecessary cuts, awkward angles and inconsistent slices. Not only does this increase prep time, but it can also crush the onion’s cells releasing more of the irritants that make your eyes water.
How to dice an onion properly? The Horizontal-Vertical-Horizontal Dice Method
Step 1: Prepare the Onion
Trim the stem end of the root but leave the root intact - this is important for holding the layers together while you work. Peel away the skin then slice the onion in half through the root. Place one half cut-side down on your chopping board.
Step 2: First Horizontal Cuts
Hold the onion firmly, make one to three horizontal cuts parallel to the chopping board. Make more cuts for a finer dice. Cut towards the root but stop just short of slicing though it – keep the root intact to hold the onion together.
Step 3: Vertical Cuts
Using the claw grip (knuckles tucked in, fingertips curled), slice the onion vertically from top to bottom, again stopping just before the root. The closer these cuts are together, the smaller your final dice will be.
Step 4: Horizontal Cuts
Still using the claw grip, slice across the onion creating horizontal cuts perpendicular to your previous slices. As you cut, perfectly diced onion pieces will fall away. Continue until you reach the root end which can then be discarded.
How to dice an onion without crying?
A few simple knife techniques can help reduce tears while cutting onions.
· Our top tip, that will make the biggest difference, is to use a very sharp knife to make clean cuts rather than crushing the onion which releases the irritants.
· Keep the root intact as it contains a higher concentration of those compounds responsible for irritation.
· Chill onions briefly before cutting if you’re particularly sensitive.
· Work quickly and confidently.
The Best GLOBAL Knives for Dicing Onions
Chef’s Knife
For most home cooks and professional chefs, a GLOBAL chef’s knife is the ideal choice.
The G-2’s razor-sharp, 20cm blade provides excellent control with minimal resistance for horizontal and vertical cuts.
If you prefer a slightly smaller kitchen knife, the GS-3 13cm Cook’s Knife offers outstanding precision.
For improved food release when cutting, why not try the fluted version of the G-2, the G-77? The fluted blade creates air pockets between the blade and food to reduce food adhesion.
Vegetable Knife
For cooks who regularly prepare large quantities of vegetables, investing in a vegetable knife provides a wider blade profile that excels at repetitive vegetable preparation, including onions.
GLOBAL’s best-selling 18cm vegetable chopping knife, the G-5, of its smaller 14cm version, the GS-5, make the perfect knife for dicing onions.
Santoku Knife
A santoku knife is an excellent choice for dicing onions. Its flat edge allows for clean, straight cuts all the way down to the cutting board, while the shorter blade gives you maximum control and agility to prevent the onion layers from separating.
GLOBAL’s most popular santoku knives are the fluted 18cm G-80 and its non-fluted version, the G-46.
Professional level knife skills aren’t about speed alone, they’re about efficiency, consistency and control which comes from repeated practise. Mastering the horizontal-vertical-horizontal onion dicing method will dramatically speed up your prep work while producing more uniform results and less tears!
Pair this technique with a GLOBAL kitchen knife and you’ll soon be dicing onions in under a minute with confidence and precision.
To learn more knife skills, have a look at our guides on the Brunoise Cut, Baton Cut and Bias Cut.