01 - Place bananas, Greek yogurt, milk, and optional sweetener into blender container.
02 - Add vanilla extract, cinnamon, seeds, and ice cubes if using.
03 - Blend on high speed until completely smooth and creamy, approximately 30-60 seconds.
04 - Taste and adjust sweetness or thickness by adding more milk for thinning or honey for sweetness.
05 - Pour evenly into two glasses and enjoy immediately.