Make 125 ml Brewed coffee and top up with 125 ml Cold water. Allow to cool.
Put the cooled coffee into a blender with 2 Bananas, 2 tablespoon Peanut butter, 2 tablespoon Cocoa powder, 1 tablespoon Maple syrup, 375 ml Skimmed milk, 1 teaspoon Vanilla extract and 0.5 teaspoon Cinnamon.
Blend everything together.
Serve in tall glasses topped with grated Dark chocolate (optional).
Notes
Use a ripe banana for the best flavour. A banana with brown spots will make the smoothie sweeter and creamier than a firm yellow banana.
Let the espresso cool before blending. Hot coffee can make the smoothie thinner and less refreshing, especially if you are using fresh rather than frozen banana.
Blend the cocoa powder with the liquid ingredients well so it fully dissolves into the smoothie. This prevents any dry cocoa from sticking to the sides of the blender.
Start with less maple syrup and add more after tasting. Bananas vary a lot in sweetness, so you may not need much sweetener at all.
For a thicker smoothie, use frozen banana or reduce the milk slightly. For a thinner smoothie, add more milk a little at a time until it reaches your preferred consistency.