For a moist, deeply chocolaty cake with a light texture, pitu recommends this very good chocolate cake, originally from a Southern cookbook by Edna Lewis and Scott Peacock, saying it’s light and moist, with a very fine crumb. middydd likes this double chocolate layer cake. And several hounds recommend Hershey’s black magic cake, though chowser thinks it’s dense, rather than light in texture.
Other hounds point to specific ingredients that make for a moist cake, including coffee (as in the double chocolate cake) and applesauce (as in the “very good chocolate cake”). ipsedixit recommends adding puréed canned beets to a typical chocolate butter cake recipe. He says you can’t see or taste the beets, but they add incredible moisture without making the cake dense.
Board Link: Moist but not dense chocolate cake recipe?