Food hacks: How to dice onion perfectly – ‘literally life-changing’

The hack was posted by Melanie Lionello who runs the TikTok account @frommylittlekitchen. The nutritionist and author detailed how to perfectly dice an onion.

The food expert has a Bachelor of Human Nutrition and a Bachelor of Human Nutrition with Honours. She has also authored two cook boots, The Recipe is Simple and From My Little Kitchen: recipes That Taste Like Home. Her onion hack currently has an enormous 5.8 million views on her TikTok account.

The food expert wrote: “I was today years old when I learned that you could dice an onion like this. Please tell me I’m not the only one.”

The cook holds the onion facing upright, after chopping a slice off the bottom for stability. She then holds the hairy tip of the onion and slices it into the onion in segments.

She then turns the onion onto its side and chops through it. The result is perfectly diced onion. TikTok users were quick to post praise for the hack.

READ MORE: ‘You’ve got to try this’: Genius hack to soften or defrost butter fast without a microwave

Why do onions make you cry?

Cutting into onions breaks open the cells of the onion, which are full of liquid. This liquid meets with the sulfur the onions as absorbed from the soil – along with other minerals.

This meeting creates syn-propanethial-S-oxide, which turns into a vapour and hits the eyes. This causes a burning sensation, stinging, which causes tears.

How to stop onions making you cry

There is a number of methods supported to help prevent onions making you cry.


Freezing onions is supposed to prevent the syn-propanethial-S-oxide from evaporating so quickly, potentially saving your eyes – depending on how quick you chop.

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