Step 1:
Select bananas that are ripe, i.e., ones you’d want to eat fresh. You can freeze bananas at that stage, but don’t worry if they start to get a little beyond ripe—you can still freeze them.
Step 2:
Peel bananas—this will make them easier to work with when you’re ready to use them.
Step 3:
You can either leave bananas whole or cut them into slices approximately ½ inch thick. If leaving bananas whole, place them in a freezer bag and remove as much air as you can before labeling the bag and placing it in the freezer. If you’re slicing, places the slices on a parchment-lined rimmed baking sheet in a single layer and put it in the freezer for 1-2 hours.
Step 4:
Remove the frozen banana slices, place them in a labeled freezer bag and, after removing as much air as possible from the bag, seal it and place it in the freezer.