Anyone got any Fabulous Chocolate Fudge Cake recipes they can link me to?

My son has his 8th birthday in a week. He hates cake, but loves my mothers chocolate fudge cake (its incredible, gooey with tons of butter cream and a fudgy icing) however as we are not on speaking terms I need the help. Can you point me in the direction of tried and tested ultimate chocolate fudge cake, so that I can do this please!!