This is from "Better Homes and Gardens Complete Book of Baking". There is another BH&G recipe posted but it is different. I haven't made that one but LOVE this one. It's very light & moist. I'd prefer it to brownies or chocolate cake any day. I very strongly recommend that you add the cinnamon. I think that is what makes it so special. This also freezes well, unfrosted. Then thaw several hours at room temperature and frost it.