Not only is this one of the easiest cakes to make, it happens - joyously - to be one of the most delicious. My household is totally addicted!

Please don't feel obliged to rush out and buy a bottle of Frangelico, the most divinely declasse hazelnut liqueur, its monkish derivation signalled by the rope that is hung from the holy-brother-shaped bottle. I use hazelnuts bought ready-ground, but ones you grind yourself in the processor will provide more nutty moistness.

For US cup measures, use the toggle at the top of the ingredients list.