Preheat the oven to 180°C (fan oven).
Line a 2lb loaf tin with greaseproof paper (see notes above).
In a large bowl stir together the flour, baking powder, cinnamon and salt. Set aside.
In a separate bowl mash the bananas until smooth.
Add the yoghurt, vanilla extract, eggs and maple syrup to the mashed banana and mix through until combined.
Now add the dry ingredients and chocolate chunks, and fold together until combined.
Spoon the mixture into the loaf tin and spread it out evenly.
(Optional) Slice a banana in half lengthways and arrange on top.
Bake in the centre of the oven for 45-50 minutes. The banana bread should have risen, be golden brown in colour and a toothpick inserted into the middle should come out clean.
Leave to cool for 20 minutes in the baking tin, then turn the banana bread out onto a cooling rack and leave to cool for 20-30 minutes.
Cut into 10 thick slices and enjoy!