Preheat your oven to 180°c and line an 8 x 8 square pan
In a bowl mash up your bananas. Add in the egg, maple syrup, peanut butter, vanilla extract and mix.
Mix in the oat flour, baking powder and sift in the cacao powder. Fold through the dark chocolate chips.
Add the batter into your lined baking dish and bake for 18-20 minutes or until cooked.
Let cool, slice up into 9 pieces and enjoy