The main difference between Red Velvet Cake and chocolate cake is the amount of cocoa powder used. Red Velvet Pound Cake uses less cocoa powder than chocolate cake, which gives it a milder chocolate flavor. The flavor matches perfectly with a cream cheese icing glaze.  Red food color is added to provide its signature red coloring. If you are avoiding red food coloring, you can substitute it with water--the cake will just be chocolate brown in color.