Originally Posted by
dodgeflyer
If your guacamole browns overnight, either put the avocado pit back in or are you not adding lime. The lime should stop the oxidisation and overnight mine doesn’t turn brown.
I use lots of lime, but haven't tried returning the pit. My expectation is that I'll never have leftover guacamole, so I throw it away
.
I think maybe the lime stops more immediate oxidation, but not if refrigerated overnight, since even when I press plastic wrap I sometimes still get browning.