I freeze my bananas with the peel on.
They are very easy to peel with a knife when frozen, may be it depends how hard your freezer is set on
I use those in smoothies or in muffins. For the muffins I peel and let defrost may be 1/2 hour
Here is my recipe:
3 bananas
1/2 cup sugar
1 Egg
1 teaspoon baking soda
1 teaspoon baking powder
1 1/2 cup flour
1/3 cup melted butter
1/2 teaspoon salt
nuts, chocolate chips are optional
1-Mix bananas, sugar and egg
2- Add melted butter
3-Add dry ingredients
Cook 20 minutes @ 350-375 degrees
12 muffins - They are the preferred muffins in this house :-)