Preheat oven to 180°C (360°F).
In a large mixing bowl, mash the ripe banana and once smooth beat with the egg. Add the maple syrup, the oil, the vanilla extract, the ground cinnamon and a pinch of salt. Stir well, until all the wet ingredients come to form a smooth mixture.
Sift into the wet mixture the oat flour, the almond flour, the baking powder and the baking soda. Mix until you get a smooth banana bread cookie dough, then fold in the chocolate chips.
Refrigerate the cookie dough for at least 20 minutes.
Scoop out some dough and shape the cookies. Line the Banana Bread Cookies over a parchment paper covered baking sheet, spacing them apart.
Bake in hot oven for 10 to 12 minutes - for soft and cakey Banana Bread Cookies, do not overbake. When they are ready, remove from the oven and let cool before serving or frosting.