Preheat the oven to 350 degrees F.
Line two baking sheets with parchment paper or silpat.
In a medium sized bowl, mix together the bananas, egg, oil, and vanilla. Set aside.
In a separate large bowl, whisk together the oats, coconut, flour, cinnamon, baking powder, and salt.
Add the wet ingredients to the large bowl of dry ingredients and mix with a rubber spatula until combined.
Fold in the chocolate chunks so they are evenly distributed.
The dough will be a bit loose, don't worry about that, they will come together.
Using an ice cream scoop or two tablespoons, scoop out the cookies onto lined baking sheets. I fit about 6-8 on a baking sheet and end up with 16-20 cookies.
Bake for 14-16 minutes, until golden on top and just browned on the bottoms. You want them to be soft.
Let cool for 10 minutes on a wire rack and enjoy!