The phrase "black cocoa" refers to a type of cocoa powder that is very dark in color. It is processed differently than regular cocoa powder, resulting in a stronger and more intense chocolate flavor. Full definition
Also, if you want extra insane chocolate - y goodness, use black cocoa powder - it was all I had on hand, it made them taste extra delicious! (isachandra.com)
A delicious dessert with a delicious surprise inside:D This time I am talking about a chocolate cookie made with black cocoa with a caramel candy inside. (cookblog.org)