Maybe not quite black, but this recipe does make a dark chocolate cake, thus deserving the name black magic. The taste is definitely magical! King Arthur Flour sells a [easyazon_link identifier="B00DUF4DIC" locale="US" tag="thskchcaba-20"]black cocoa[/easyazon_link] (affiliate link)that could create an even darker cake. It's Dutch-processed so you can't just swap it out for regular cocoa as the leaveners also need to be tweaked. But feel free to accentuate the intensity by substituting 1/4 cup or less of the regular cocoa powder for the black cocoa if you'd like to go that route.