We love avocados. There are so many yummy ways to enjoy avocados, and they’re also a delicious snack on their own. But often times, one half ends up getting saved for later, leaving it susceptible to unfortunate browning.

We’ve heard a bunch of methods for keeping cut avocados and guacamole from browning in the fridge over the course of a few days. But we’ve never before seen a side by side comparison of these methods in action.

We’ve heard the veggie spray method and the onion method, among others, but which technique actually works the best after 72 hours? About.com has the answers: