Bread machine banana bread generally involves less work & steps than an oven-baked banana bread. A bread machine will mix the ingredients for you and bake the banana bread for you in the same machine. In contrast, an oven-baked banana bread involves more work & steps (i.e. you will need to mix the ingredients, pour into a bread pan and move to an oven).
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For long-term storage, you should freeze the banana bread. It should be completely wrapped in plastic wrap or aluminum foil and then placed in a resealable plastic bag. Place the wrapped banana bread in the freezer and it should last for several months. FYI – Some people prefer to slice the banana bread first (and then wrap each slice) before freezing because it is easier to thaw out the desired number of slices versus dealing with an entire frozen banana bread loaf.