In a high-speed blender or food processor pulse banana pieces on low to medium-low until crumbly, stopping and scraping down sides once or twice. Add almond milk and almond extract; blend continuously 30 seconds to 1 minute or until smooth and creamy, adding more milk if needed. Stir in chopped cherries.
Serve immediately or transfer to a 1-qt. container and store in the freezer up to 1 week.