If there is an easy one.....

I decided I would be nice and help my friend out with her wedding (as her DF was let go from him job a few months before the wedding) and bake/decorate the cake.
So she sent me a picture of the cake/cupcakes she liked. So I did a trial and she didn't like them.
So the wedding is this Sat and I have to start making the cake today.
Has anyone got an easy, if not easy delicious recipe for a chocolate mud cake.

I do not have much money myself and don't want to go out and spend a fortune on everything.
It has already cost me $70 so far just for the cake stand, cup cake wrappers,decorations and still haven't even got the frosting yet.
So any advice on budget cake ingredients/frosting?

Better yet anyone in Brissy wanna make the cake Well I just had to try didn't I

Thanks in advance