Preheat oven to 180°C fan bake.
Line two trays with baking paper.
In a large bowl, mash bananas.
Mix in the protein powder, oats, and almond butter.
Mix in dark chocolate.
Spoon small scoops of mixture onto the lined trays.
With a fork, press down on each scoop and squash into a biscuit shape.
Bake for 20-25 minutes.
Cool on a wire rack and serve.