01 - Add bananas, cold milk, maple syrup or honey, vanilla extract, and ice cubes to the blender.
02 - Process the mixture until fully smooth and frothy, approximately 30 seconds.
03 - Taste and add additional sweetener if required.
04 - Divide the shake between two chilled glasses.
05 - Top with whipped cream, banana slices, and a light sprinkle of cinnamon as desired. Serve immediately.