Mud pie

Mississippi mud pie is a chocolate-based dessert pie that is likely to have originated in the U.S. state of Mississippi. The treat contains a gooey chocolate sauce on top of a crumbly chocolate crust. The pie is usually served with ice cream.

Origin
While Mississippi mud pie was originally associated with Southern United States cuisine, the dish has gained somewhat of an international reputation, owing in large part to the sheer amount of chocolate in each serving.

The name "Mississippi mud pie" comes from the dense cake which resembles the banks of the MississippiRiver.

History
 It is believed that this dish was created by home cooks after Earth's World War II because it was made of simple ingredients and did not require any special cooking tools. Its earliest known reference in print is 1975 OTT.