Preheat oven to 175°C.

In a bowl take eggs, banana, cocoa powder and baking powder.

Using a hand blender, blend it into a smooth batter.

Grease and dust two ramekins with cocoa powder.

Divide the batter between the ramekins and top it with chopped dark chocolate.

Bake in the preheated oven for 15 - 20 minutes or until a tooth pick inserted comes out clean.

Allow it to cool a little before removing the cake from the ramekin.

Cool completely and enjoy!