01 - Place the sliced bananas, milk, peanut butter, cocoa powder, and honey or maple syrup (if using) into a blender.
02 - Add the ice cubes to the blender.
03 - Blend on high speed until smooth and creamy, about 30 to 45 seconds.
04 - Taste the smoothie and adjust sweetness by adding more honey or maple syrup if needed.
05 - Pour into glasses and serve immediately. Garnish with banana slices or a drizzle of peanut butter if desired.