Did You Know the Pit Helps Keep Avocado Dip Fresh?

Did you know the pit helps keep avocado dip fresh?

I love fresh guacamole. Whenever I have any left I put it in the fridge where it invariably turns brown on top. I usually stir it and finish it anyway. But yesterday I remembered to try a trick I had heard many times. I always put in lemon juice but this time I remembered to put the pit back into the dip. When I took it out of the fridge today, it was still a bright, fresh green!