484 (batter) + 54 (dark chocolate) = 538
Mash the bananas.
Mix oatmeal, baking powder, salt, and cinnamon powder.
Add eggs, milk, and olive oil, then mix the batter.
Add the mashed banana to the batter and mix well.
Pour the batter into a pan and bake in a preheated oven at 180°C for 35 minutes.