I have an awesome white chocolate mudcake recipe- I have trialled it for my wedding cake and it is the best i've ever tasted! I don't think i'm allowed to post a link- but if you google exclusively food white chocolate mud cake, it should come up! hopefully!

oh I just googled it and it was the top one, so give it a try. It also has the conversion of amounts of ingredients for different sizes of the cake- so you can make it in any size you want.