01 - Place the prepared bananas, milk, peanut butter, sweetener (if using), vanilla extract, and ice cubes into a blender.
02 - Secure the lid and blend on high speed for 30 to 60 seconds, or until the mixture achieves a smooth and creamy consistency.
03 - Sample the smoothie and add more honey or maple syrup if a sweeter taste is desired.
04 - Pour the smoothie into serving glasses and present immediately.