Begin by taking the frozen banana out of the freezer. Carefully peel it and break it into smaller chunks to facilitate blending.
In your blender, combine the prepped banana chunks with the creamy peanut butter, almond milk, cocoa powder, honey or maple syrup (if using), and vanilla extract.
For a thicker, frostier smoothie, toss in a handful of ice cubes into the mix.
Blend on high speed until all ingredients are thoroughly combined, achieving a creamy and homogenous texture. If the smoothie is too thick for your liking, simply add a splash more of almond milk and blend again until smooth.
Once blended, give it a taste. If you prefer it sweeter, feel free to add a bit more honey or maple syrup until you reach your desired flavor.
Carefully pour the luscious smoothie into a chilled glass to help maintain its freshness and temperature, and enjoy immediately for the best experience!