This is a quite dense, moist banana bread that's almost puddingy with an added boost of chocolate bits throughout. Very ripe bananas are needed for their intensity. I usually ask if there are any out the back at fruit shops. Be careful when buying bananas for ripening at home - make sure they haven't been previously refrigerated otherwise the gases that cause ripening stop being released and they won't ripen any further.
Over ripe bananas make a huge difference to the flavour