I have recently made the discovery that cakes, flapjacks and other baked goods will all freeze well. Joy! This means I can now bake to my hearts content without worrying that my partner and I will have to eat the proceeds in a few days (or trying to find people to offload my baked goods onto).
The combination of flavours in this cake sounds like it wouldn't work (my partner's exact words before eating it: "I'm not sure about this...") but it really does. And providing you use ripe bananas, you should be able to taste the two flavours seperately whilst they still compliment one another.