This is a tasty cake. I cut it in half this time and put it into an 8x8 pan, and through in a handful of chocolate chips too. Also I left out the margarine/butter and just added a splash more oil. Well actually I just left it out and pretty much everything else I guessed at the amount. Still turned out great.
One thing I added was a pinch of Hot Chili powder. The heat goes well with chocolate, and it becomes a "hot chocolate" cake. My sister taught that to me, now I do it regularly.