Yes! Banana Coffee cake freezes really well. I usually cut the coffee cake into 4 portions. Wrap each portion in parchment paper and remember to label. Wrap each portion in several layers of plastic wrap or place in a ziptop bag or sealed container. It will stay fresh, if sealed properly, up to 6 months.  To thaw, unwrap the coffee cake and defrost. You can eat it as soon as it thaws or place it in the microwave for about a minute or heat up for 5-10 minutes in a 400 degrees Fahrenheit oven.