This has to be one of my favourite combinations ever created. I grew up eating this on toast or crumpets for breakfast (with honey too, which is probably where my sugar addiction originated). It's also common, when in Paris, to order a crepe with banana et nutella and this is seriously delicious. But let me tell you, in cake form this combination is a marriage made in heaven. The two batters aren't properly mixed together so you can see the separate layers and leave your favourite part till last.