01 - Add the sliced bananas, Greek yogurt, milk, and optional sweetener to the blender jar.
02 - Sprinkle in vanilla extract, cinnamon, seeds, and a handful of ice cubes if using.
03 - Process on high speed until completely smooth and creamy, approximately 45-60 seconds.
04 - Taste the smoothie and add more honey for sweetness or additional milk to thin the consistency as desired.
05 - Pour evenly into two glasses and serve right away while chilled.