I didn't have all the ingredients to make Nigella Lawson's Chocolate Guinness Cake, which seems to get consistently good reviews, so I decided to tackle Delia Smith's recipe instead.
You'll see, when you compare my photo with the one shown with the recipe, what was wrong with the cake - it didn't rise well and the quantities given for the frosting and filling were very sparse. It was also a crumbly but sticky cake (how is that possible?), so it was difficult to turn out of the sandwich tins. I added the chopped walnuts to the filling, but decided not to use them on top.
The texture was moist and dense, and the flavour was fine, although nothing special, and the frosting was not as richly chocolatey as I'd expected, considering the high proportion of chocolate added. Sometimes I think that cocoa gives a better flavour in frostings.
I'm not sure I'd bother to make this again, but if I did, I think I'd try making it in 7" sandwich tins to give a deeper cake and the illusion of more filling and frosting.