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