No matter how much you like blueberries, it’s not likely a family of four is going to go through a gallon of them before they start to spoil. So if you’ve got a gallon of blueberries, you’re going to want to freeze some of them.
If you know for sure how much you’re going to want, and that you’re just going to be pureeing them when you use them anyway, you can just dump them into the right size containers and pop them in the freezer. But I’m betting you don’t know how you’ll be using them. So you’ll want them separate when they freeze.
If you toss a bunch of freshly-washed berries together and freeze them, you’ll turn them into one big chunk. So instead, spread them out on a baking sheet covered with wax paper or parchment paper. (See photo above.)
Don’t think you can cut corners and not use the paper. You’re wrong. The berries will freeze hard to the metal and you’ll have to scrape them off. You’ll break them up and ruin them. Don’t do that.
Pop the tray in the freezer for at least an hour.
You want the berries to be hard to the touch, like marbles. Peel up the corner of the wax paper and the berries should all separate.
If any stick together, pop them apart with your fingers. Don’t handle them too much, or your hands will warm them up and they’ll get mushy on the outside.
Lift up the edges of the paper and pour the berries into a zip-top freezer bag until you need some.
And that’s it.