Best chocolate cake for a 5 yo's party?

[whimsicalname]

That's it really. Hit me with your foolproof recipes for a dozen discerning pre-schoolers and their parents.

I was thinking about a Guinness cake. Would that be wrong?

DH makes this but with a ganache (equal dark chocolate and double cream) icing rather than the one in the recipe. If you crumb coat the cake and then pour a layer of ganache it looks beautiful.

www.bbcgoodfood.com/recipes/4508/chocolate-birthday-cake-

This one is really easy and extremely tasty. It stores well too (probably the yoghurt stops it drying out). I just make an icing with double cream and chocolate and then chocolate buttons on the top for decoration.