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