01 - Add the banana, milk, peanut butter, cocoa powder, and sweetener (if using) to a blender.
02 - Add vanilla extract and ice cubes, if desired, for extra creaminess and chill.
03 - Blend on high until smooth and creamy, ensuring all ingredients are fully incorporated.
04 - Taste and adjust sweetness if needed by adding more honey or maple syrup.
05 - Pour into two glasses and serve immediately while chilled.