This is the mother of Easter cakes. It's taken from Sarah Tuck's From The Kitchen, and she quite rightly describes it as "a big rich ole beast of a cake". I swapped in the hazelnut liqueur for Baileys (a great choice of party gift at a friend's 21st) but the rest is pretty similar. I squidged the leftover chocolate mousse filling into ramekins for pud with raspberries and cream.
I must admit, this cake was a faff. It involves melting and freezing and whipping and chilling and quite a lot of waiting. But for a winner of a birthday cake on a day when you'd be home anyway, it's the best.
