Originally Posted by
JBord
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

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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.
I’ll give you it loses its illustrious shine however I’ve never have it go properly brown which is how some people make it seem theirs go.