01 - Place the banana slices, milk, cocoa powder, peanut butter, honey or maple syrup, vanilla extract, and ice cubes into a blender.
02 - Blend on high speed until the mixture is smooth and creamy, about 30 to 60 seconds.
03 - Taste the smoothie and add additional honey or maple syrup if desired, blending briefly to incorporate.
04 - Divide the smoothie evenly into two glasses and serve immediately.