Stop Letting Avocados Get Brown cont.
The Olive Oil MethodBrush the avocado half with olive oil . The oil will keep the flesh from coming in direct contact with the air, preventing oxidization. After brushing with the oil, store the avocado in an airtight container in the fridge. The Onion MethodRoughly chop a quarter of a red onion into large chunks. Line the bottom of a sealable container with the onion pieces, then place the avocado half cut side-up on top. Seal the container and keep in the fridge. According to The Kitchn, this is likely due to the vapors that onions emit. Luckily, because the skin is the only part of the avocado in contact with the onion, the flesh won’t take on any flavor. And you can save the onions for later use!