Do you ever buy fresh guacamole at the grocery store in a plastic tub, and it's really nice and green looking, and so you eat some of it and then put the lid on the tub and put it in the refrigerator for later? But then a couple of days later, the top of the guacamole has turned brown and has little puddles of brown liquid in it?
Yeah, I usually pour off the liquid and eat it that way too, and it tastes pretty much the same. But did you know you can keep it green with a piece of food wrapping?
You probably guessed that it's the exposure to air that causes the problem - after all, it sat in the store for a while, right? But it was filled all the way up to the lid. So - now after I eat some, I take some wax paper (my favorite, but plastic wrap works too) and tear it into a shape that will cover the guacamole - if the tub is square (it always is around here), I make a rectangle, so that a portion of it can be folded upward to make it easier to grab when I want to eat more. Stays as green as it was when I bought it!