How to Dice Onion

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Mastering the art of How to dice Onion is an essential skill for any home 👩‍🍳 chef. Whether you’re preparing a fresh Roasted Tomato Salsa, adding flavor to your favorite soups and stews, or creating a savory base for stir-fries and casseroles, knowing how to properly dice an onion can improve your dishes. My step-by-step guide will help you achieve uniform, perfectly sized onion pieces with ease, minimizing 💦 tears and maximizing flavor. With a few simple techniques, you’ll be dicing onions like a pro in no time, ready to make any recipe even better with this common ingredient.

Why You’ll Love How to Dice Onion

You’ll love my take on How to Dice Onion because it makes the task so quick and easy. Use these clear steps to help you get perfect, uniform pieces every time, adding fresh flavor to your recipes. This method will become your go-to for adding 🧅 onions to your meals, making cooking more enjoyable and hassle-free.

How to Prepare How to Dice Onion

✨ Using a sharp chef’s knife a bit off the front end of the onion, keeping the root intact.

🟤 Place the onion flat side down and cut it in half through the root.

🧅 Peel the skin off each half.

🔪 Optionally, make 3-4 horizontal cuts in each half (be careful or skip if nervous).

🌿 Make lengthwise cuts close together, cutting as close to the root as possible.

🥣 Finally, dice the onion by making horizontal cuts perpendicular to the lengthwise cuts.

Nonna’s Tip 🧅

Chill the onion in the refrigerator for about 15-30 minutes before cutting it. This helps to reduce the release of sulfur compounds, which can cause eye irritation and tears while chopping.

How to Dice Onion

Variations and Substitutions for How to Dice Onion

  1. Use 🔴 red onions for a milder flavor and vibrant color, or sweet onions such as Vidalia for a sweeter taste.
  2. Adjust the size of your cutting based on the recipe you are preparing. For soups and stews, larger chunks might be preferable, while smaller dices are better for 🥗 salads and salsas.

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Common Questions

What type of cutting board should I use?

Be sure to use a steady cutting board when you are learning How to Dice Onion; make sure the board doesn’t move on the counter. You can do this by using a damp paper towel under the board or a non-slip mat or a cutting board that has grips on the bottom. The paper towel method is my favorite.

How should I hold the knife when cutting?

Have a sturdy hold on the knife and never put your pointer finger on top of the knife. Wrap your entire hand around the handle closer to the bottom. Your hand shouldn’t be near the top of the handle where you have no control.

How can I make sure I am cutting safely?

When learning How to Dice Onion or cut anything, always make a ‘claw’ with your non-cutting hand and place your knuckles down on the vegetable you are cutting. Your knuckles will protect you from cutting yourself and guide you. Then, always move the guiding hand back as you cut and pay attention. Go as slow as you need to! Have patience and enjoy the process. This should be relaxing and therapeutic.

How to Dice Onion

How To Dice Onion

Mastering the art of How to dice Onion is an essential skill for any home 👩‍🍳 chef. My step-by-step guide will help you achieve uniform, perfectly sized onion pieces with ease.
No ratings yet
Course: Tutorials and Hacks
Author: The Modern Nonna
Prep Time: 5 minutes
Total Time: 5 minutes


  • Cut a little bit off of the front end of the onion leaving the back end which is the root in tact.
  • Place it flat side down and cut it in half straight through the root.
  • Take each halve and peel off the top skin. Place it flat side down and optionally start making 3-4 horizontal cuts — be very careful or skip this step if you are nervous and proceed to the next step.
  • Now you can make lengthwise cuts that are closer together and make cuts as close to the root as you possibly can.
  • Last but not least, start dicing the onion by making horizontal cuts perpendicular to the ones you just made.


Additional Info

Course: Tutorials and Hacks
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Hi! I'm Sneji. Nice to meet you!

I am more commonly known as “The Modern Nonna” on social media where I create easy home cooked meals with a modern twist. I was born and raised in Sofia, Bulgaria and learned how to cook at the best culinary school in the world – my grandma’s kitchen. I lived in Greece on the Island of Crete with my parents for a while and then moved to Toronto, Canada when I was in grade 5. I started to really cook and experiment with food 11 years ago when I was 21 years old. Everything I currently know is a reflection of some part of my life…

Keep up to date with me on social media! Follow @themodernnonna

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