Whether it’s ripe or underripe, once you cut open an avocado and it’s exposed to air, it will start to brown. There are a few methods you might try to combat the browning. You could squeeze lemon or lime juice over the avocado. You can also store the pieces in water, brush them with oil, store them with an onion, or tightly wrap the exposed avocado flesh with a plastic cling wrap. All of these methods work to keep oxygen from getting to the exposed avocado, which will then cause it to oxidize and turn brown.
Whichever method you choose, chances are there’s still going to be some level of browning when you unwrap or otherwise expose the cut avocado. Don’t worry though, as a browned avocado still totally safe to eat!
Need some avocado inspiration? Check out these best recipes to make with avocados, which include some beloved standbys like guacamole and avocado toast, as well as more surprising but no less delicious uses for this wondrous fruit.