If you are making guacamole or my Avocado corn salsa ahead of time , I don't recommend more than a few hours. A trick I use to prevent it from turning brown before you serve it ,is to cover the homemade guacamole in the serving bowl with a piece of plastic wrap ( I like Saran wrap, not the deluxe one) push the plastic wrap up against the top of the mixture so that the avocados do not touch the air. This will slow down the browning on the Guac. I also put the avocado pit in the middle of the guacamole, not sure if that really does anything or if its a wives tale, but I figure it can't hurt. Remove the pit when serving.
Keep Your Guacamole Green!!
