Place rinsed berries on a clean towel and bloat them dry with another towel.
Place a piece of parchment on a rimmed baking sheet and lay berries on top. Use the space efficiently, but try not to let them touch too much.
Optional: Lay another piece of parchment on top of the berries and top with an additional layer of berries. You can do up to three layers on the same baking sheet before it becomes precarious.
Allow the blueberries to freeze through (1.5-2 hours) and then transfer to a freezer-proof storage container.
Notes
If you're using Ziploc-style bags, removing additional air out of the bag will keep your berries safe from freezer burn. Place a straw in the corner of a freezer bag and close the bag as tightly as possible. Suck the air out through the straw 1-2 times and quickly remove the straw and seal the bag.Store in your freezer for 6-12 months.