Mud cake, also referred to as Mississippi mud cake or mud pie, is a type of chocolate cake made in virtually endless variations. There is no standard recipe for this cake. It is believed to have originated in the 1970s and 1980s in the American South, and some say it is baked to resemble the mud along the banks of the Mississippi River. Mud cakes function well as birthday cakes, holiday cakes, or even in cupcake form. Some people use them for their wedding cakes, though they often need to be a little denser than usual to accept extra layers, heavy icing, or decorations.