Preheat the oven to 350 degrees. Line a small baking sheet with parchment paper and set aside.
In a small bowl,mash banana with peanut butter and vanilla extract. Mix the oats,baking powder and ground cinnamon together and mix it with the mash banana. Pour the batter on to the parchment paper, and using a fork create a jumbo cookie shape. (don’t make it too flat). Decorate the top with chocolate chips gently pressing them to set.
Bake for about 16 to 18 minutes on the middle rack. Let it cool. Divide into 8 slices.
You can make it ahead of time, wrap and freeze for future snacks.