Dutch process cocoa is cocoa powder that has been alkalized to remove the acidity from the cocoa. This process also makes the cocoa powder a more mellow flavor and gives it a darker color. There are red, brown, and black Dutch process cocoa powders. David Lebovitz has a whole blog post about the different types of cocoa powder, but the short answer is as follows: All black cocoa powders are Dutch process, but not all Dutch process cocoa powders are black cocoa powders!