Michigan State University Extension
Preserving Food Safely - 01600754
Freeze leftover plantains that have turned brown and use them for cakes and breads. Whole plantains will hold their shape, even when sliced, but will darken when frozen. Freeze the fruit in the skin or peel it. If you freeze plantains with the peels on, allow them to thaw fifteen minutes before peeling. Use a blender, food processor or fork to mash the plantains if you freeze them as a puree. Add 1 tablespoon of lemon juice to each cup of mashed fruit. Dry pack.
For a special treat in summer, cut ripe plantains in thirds, roll them in a mixture of carob powder and orange juice, then in unsweetened coconut or chopped nuts. Insert a Popsicle stick in each plantain, tray-freeze, then transfer to a plastic freezer bag. Eat frozen. Frozen plantains also add smooth, thick texture to ice cream mixtures in the blender or food processor prior to freezing.