This is another of Dan Lepard's marvellous recipes. The unusual blend of ingredients - tahini, salted peanuts, cinnamon and chilli - together with a tangy lime flavoured icing gives this cake a very complex flavour. It's supposed to be reminiscent of a South American mole.
The ground salted nuts give a coarse texture to the cake - if you don't like this be sure to grind them as finely as possible. To my mind the cake is a little too dry to be called a fudge cake; it might benefit from a more fudgy frosting rather than a glacé icing, but the cool tang of lime does bring out the warmth of the chilli.
I would call this a good snacking cake - robust and sturdy rather than fragile or crumbly. Just right to accompany a mug of black coffee - or hot chocolate - mid morning.