Daily Kitchen Note
Avocados brown quickly when exposed to air, making them look unappetizing. Tightly wrapping the cut avocado in plastic wrap and refrigerating it is the most practical way to minimize browning without altering the flavor.
How to Wrap tightly in plastic wrap
- Leave the pit in the avocado half you plan to store.
- Tear off a piece of plastic wrap large enough to cover the avocado.
- Press the plastic wrap tightly against the exposed flesh of the avocado, ensuring there are no air pockets.
- Store the wrapped avocado in the refrigerator.
Why it works
Avocado browning is caused by an enzyme called polyphenol oxidase reacting with oxygen in the air. Pressing plastic wrap directly against the cut surface limits the amount of oxygen that can reach the flesh, significantly slowing down the enzymatic browning process.
Source
Michigan State University Extension: How to safely store and preserve avocados
