Onions contain sulfur compounds that create syn-propanethial-S-oxide when cut, which triggers tears as a defense mechanism. To minimize crying, select sweeter onion varieties, like Vidalias or green onions, that release fewer defensive chemicals. Using a sharp knife reduces surface area cut, preventing more chemical release. Alternative methods include submerging the onion in ice water for at least 30 minutes to slow down the release of chemicals or wearing goggles to keep the chemicals from the eyes. These various methods can help reduce tears while chopping onions.
To prevent crying while cutting onions, one can choose sweeter onions, use a sharp knife, or wear goggles to block the defensive chemicals from reaching the eyes.
Onions create syn-propanethial-S-oxide when cut, a defense mechanism that causes tearing to wash out the chemicals. Understanding this can lead to effective cutting hacks.
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