There are a few variations you can try when preserving avocados. I use a Kitchen Aid mixer to mash the avocados as it takes less than a minute. If you don’t have one, you can use a potato masher. A fork works in a pinch, it just takes a lot longer. I like to bag the avocados in quart bags to freeze them. One avocado worth of mash pressed really flat takes up very little room in the freezer. But you can also use ice cube trays. I would go with two inch cubes for a good portion size. Just spoon the mashed avocado into the trays and press plastic wrap onto the surface of the avocado so no air gets in. Freeze it and you then have perfect single servings of avocado whenever you want them.