Grind the oatmeal finely in a blender.
Mash the banana and mix with the egg.
Add oatmeal, cocoa powder, and baking powder, and mix well.
Chop dark chocolate into small pieces and add to the batter.
Add oil to a pan and pour in the batter.
Cover with a lid and cook on low heat.
Flip when browned and cook a bit more until done.