In a bowl, combine the 1/2 mashed banana, 1/3 cup oat flour (blended oats), 1 serving of cocoa protein powder, 1 tablespoon cocao powder, 1/2 teaspoon baking powder, and 1/3 cup nut milk. You can also blend all these ingredients together. Pour the mixture into a greased baking dish and top with chocolate chips. Bake at 350°F (175°C) for 20 minutes, or alternatively, microwave for 2 minutes.