01 - Place frozen banana slices, milk, unsweetened cocoa powder, creamy peanut butter, maple syrup or honey, vanilla extract, and salt into the blender.
02 - Blend on high speed until the mixture is fully smooth and creamy.
03 - Taste the smoothie and adjust the sweetness by adding more maple syrup or honey as desired.
04 - Pour the smoothie into two glasses for serving.
05 - Garnish each glass with whipped cream, chocolate shavings, or crushed peanuts if desired. Serve immediately.