01 - Place frozen bananas, milk, cocoa powder, peanut butter, maple syrup or honey, vanilla extract, and salt into a blender.
02 - Blend the mixture on high speed until the texture is smooth and creamy, with no visible lumps.
03 - Taste the smoothie and add additional maple syrup or honey as needed to achieve desired sweetness.
04 - Divide the smoothie evenly between two glasses.
05 - Garnish with whipped cream, chocolate shavings, or crushed peanuts if desired. Serve immediately.