01 - Place frozen banana slices, milk, cocoa powder, peanut butter, maple syrup or honey, vanilla extract, and a pinch of salt into the blender.
02 - Blend on high speed until the mixture is creamy and no banana chunks remain.
03 - Taste the smoothie and add additional maple syrup or honey as needed, blending briefly to combine.
04 - Divide the smoothie evenly between two glasses.
05 - Top each glass with optional whipped cream, chocolate shavings, or crushed peanuts. Serve immediately.