If you haven’t already, slice your banana into chunks and freeze in a sandwich bag. Once the bananas are frozen, you’re ready to make your ice cream.
Add frozen bananas to a food processor. Process for a few minutes. I had to stop occasionally and smoosh up some large frozen chunks that didn’t want to break up right away. Keep processing and you will eventually get what looks like soft serve ice cream. Add maple syrup and cinnamon and pulse until combined.
Transfer mixture to a tupperware bowl and stir in nuts and chocolate chips. Freeze until firm, at least 2-3 hours.