Place blueberries in a single layer on a cookie sheet or pan. Put the tray in the freezer (or, better yet, right into the freezer); freeze about three hours; remove from oven; place blueberries in an airtight container and store in the freezer.
If you don’t have a large enough freezer to accommodate a cookie sheet or baking pan, place the blueberries on a plate and once frozen, transfer them into an airtight container. They’ll be easy to separate this way and you can use them at your convenience.
Another option is to freeze individual berries first (on the tray or plate) and then place them into a container to combine all the berries.
You can also place blueberries in a freezer bag, removing as much air from the bag as possible and keeping them in the freezer for six months or more without any noticeable loss in taste or quality!
After the blueberries are removed from their frozen state, they can be used to make smoothies and fruit salads.
So this is how to Freeze Blueberries.