Good news! There is no need to toss out that left over guacamole and you can make it ahead of time for when guests are coming over without worrying about that brown discoloring.
We have heard about many ways to keep guacamole fresh and green, so we decided to try a few different methods and see which works best.
Our first method is one we have heard many times and that is placing the avocado pit into the guacamole.
The second method is to spray the guacamole with cooking spray before placing the lid on the container.
The third method is to cover the guacamole with a thin layer of water before placing the lid on the container.
We made of 4 containers of guacamole and left one untouched and the others as described above. We put them in the refrigerator for about 3 hours.
As you can see the water method by far had the best results. I took the lid off and poured the water out and the guacamole was as bright and green as when I put it in the refrigerator.
The cooking oil worked moderately well, but there was still some discoloration.
Placing the pit into the guacamole did not seem to make much difference at all, it is nearly as brown as the untouched container.
Do you have any great tips for helping keep food items fresh, send us a message with your ideas.
Diane in Wisconsin
written on 4 May 2015 -Thanks for the test! Water appears to be the winner, although the oil is a close second.