Another shared that the water hack also works with halved avocados.
Stephanie Kelley shared a video to Instagram showing the process and kept the halved fruit in a bowl of water for two days.
A Sydney nutritionist has also revealed three other ways to keep avocados from browning.
Rebecca Gawthorne revealed that you can use lemon, olive oil and even onion to stop discolouration.
Gawthorne shared the tips on her Nourish Naturally Instagram page.
"The browning of an avocado is a natural chemical reaction called oxidisation that occurs when a cut avocado is exposed to oxygen in the air," she explained.
"While it's safe to eat, brown avocados are not very aesthetically pleasing and can taste a bit bitter," she added.