01 - Place bananas, Greek yogurt, milk, and sweetener if using into blender container.
02 - Add vanilla extract, cinnamon, seeds, and ice cubes if desired to the blender.
03 - Blend on high speed until completely smooth and creamy, approximately 1-2 minutes.
04 - Taste and adjust sweetness or thickness by incorporating additional milk or honey as needed.
05 - Pour evenly into two glasses and enjoy right away for best texture and flavor.