Preheat your oven to 350°F (175°C) and lightly grease a small baking dish or a ramekin.
In a mixing bowl, combine the mashed banana, rolled oats, cocoa powder, milk, baking powder, salt, and honey (if using) until thoroughly mixed.
Pour the mixture into the prepared baking dish and smooth the top with a spoon.
Sprinkle chocolate chips on top, if desired.
Bake in the preheated oven for about 25 minutes or until the top is set and slightly golden.
Allow the baked oats to cool slightly before serving. Enjoy this delicious meal warm!