Slice the banana thinly.
In a bowl, mash the cooked banana and mix in the egg, milk, and honey.
Sift in cake flour, baking powder, cocoa powder, and salt and mix together.
Add chocolate chips and gently fold them in.
Pour the batter into a bread pan and top with the sliced banana.
Bake in a preheated oven at 180°C for 30-35 minutes.