How to cut a red onion without crying?

Aug 15, 2025

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Bob Johnson
Bob Johnson
Bob works as a purchasing manager at Shandong Weihaomei Food Co., Ltd. He is responsible for sourcing high - quality agricultural products. With his professional judgment, he ensures the raw material quality for the company's production.

Hey there! As a red onion supplier, I've seen folks struggle with the age - old problem of cutting red onions without crying. It's a common woe, but don't worry, I've got some tips and tricks up my sleeve to help you tackle this issue.

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First off, let's understand why we cry when cutting red onions. Red onions, like other onions, contain a compound called lachrymatory factor synthase. When you cut into an onion, you break its cells, releasing enzymes that turn the sulfur compounds in the onion into sulfenic acids. These acids then react with the lachrymatory factor synthase to create a gas called syn - propanethial - S - oxide. When this gas reaches your eyes, it irritates them, and your eyes produce tears to wash away the irritation.

Now that we know the science behind it, let's get into the ways to cut red onions without crying.

Chill the Onion

One of the simplest methods is to chill the onion before cutting. Pop it in the fridge for about 30 minutes or in the freezer for 5 - 10 minutes. Cold temperatures slow down the chemical reactions that produce the irritating gas. So, when you cut a chilled onion, there's less gas being released, and you're less likely to cry. It's an easy fix that doesn't cost you a thing!

Use a Sharp Knife

A sharp knife is your best friend when it comes to cutting onions. A dull knife crushes the onion cells rather than slicing through them cleanly. When cells are crushed, more of the enzymes and sulfur compounds are released, leading to more gas production. On the other hand, a sharp knife makes clean cuts, minimizing the amount of cell damage and thus reducing the amount of irritating gas. So, invest in a good quality, sharp knife and keep it well - maintained.

Cut Under Running Water

This is a classic method. Turn on your kitchen faucet and cut the onion under a gentle stream of running water. The water helps to wash away the gas as it's released. You can also fill a large bowl with water and cut the onion while it's submerged. However, this method can be a bit tricky as you need to keep your hands and the knife steady in the water. But if you can master it, it's very effective in preventing tears.

Light a Candle

Lighting a candle near your cutting board can also help. The heat from the candle flame creates an updraft that draws the gas away from your eyes. Place the candle close enough to the cutting area so that it can capture the gas but far enough that you don't accidentally set your onion or anything else on fire. It's a simple and somewhat old - fashioned solution, but it works for many people.

Wear Goggles

If all else fails, you can always wear goggles. They create a physical barrier between your eyes and the irritating gas. You don't need fancy, expensive goggles; even a pair of swimming goggles will do the trick. Just make sure they fit well and don't fog up. Wearing goggles might look a bit silly, but it's a surefire way to keep the tears at bay.

Cut Near a Fan

Setting up a small fan near your cutting area can blow the gas away from your face. Point the fan so that it's blowing across the cutting board and away from you. This way, the irritating gas is directed away from your eyes, and you can cut your red onions in peace.

Now, let's talk a bit about the products we offer as a red onion supplier. We have a great selection of red onion products, including Red Onion Shreds. These shreds are perfect for adding a burst of flavor to your salads, sandwiches, and stir - fries. They're pre - cut, so you don't have to worry about the whole crying - while - cutting ordeal.

We also offer Yellow Onion Shreds. Yellow onions have a slightly sweeter and milder flavor compared to red onions. These shreds are versatile and can be used in a variety of dishes, from soups to casseroles.

And for those who prefer a more convenient option, we have White Onion Powder. It's a great way to add onion flavor to your cooking without the hassle of cutting fresh onions. Just sprinkle it into your recipes, and you're good to go.

If you're a restaurant owner, a food manufacturer, or just someone who loves cooking with onions, we'd love to have you as our customer. We offer high - quality products at competitive prices. Whether you need a small amount for your home kitchen or a large quantity for your business, we can meet your needs.

If you're interested in our red onion products or want to learn more about our supply options, don't hesitate to reach out. We're here to answer all your questions and help you find the perfect onion products for your needs.

In conclusion, cutting red onions without crying is definitely possible. By using these simple methods, you can say goodbye to those annoying tears and enjoy the process of cooking with red onions. And if you want to skip the cutting altogether, our pre - cut and powdered onion products are here to make your life easier.

So, what are you waiting for? Contact us today to start your onion - filled culinary journey!

References

  • "The Chemistry of Onions: Why Do They Make You Cry?" Scientific American.
  • "How to Cut an Onion Without Crying." The Kitchn.
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