01 - Place bananas, milk, maple syrup or honey, vanilla extract, and ice cubes in a blender.
02 - Blend on high speed until the mixture is smooth and frothy, approximately 30 seconds.
03 - Taste the shake and adjust sweetness if necessary by adding more maple syrup or honey.
04 - Pour the shake evenly into two chilled serving glasses.
05 - Top with whipped cream, banana slices, and a light sprinkle of ground cinnamon if desired. Serve immediately.