I've taken to freezing bananas whenever there's a stray overripe one lying around. It renders them almost completely useless, as they turn into a sludgy mess when defrosted. However, looks aside, they do make perfect banana bread and that way I can freeze a banana every so often until I have enough in the freezer to bake with.
I came across this recipe while looking up Nigella classic banana bread in How to be a Domestic Goddess. These are ridiculously easy to make and taste as good at they sound. The dried raspberries (or cherries) contrast with the sweet banana muffin and the white chocolate adds a butterscotch touch.
Taken from How to be a Domestic Goddess but changed slightly
3 ripe medium bananas
1tsp bicarbonate of soda
1/2tsp baking powder
40g dried raspberries, cherries
50g white chocolate