In KC, we have Lamar's Donuts, which offers an artery-clogging, diabetic shock-inducing 8" long, 2.5" wide Longjohn, frosting filled and smothered in chocolate.
See center bar at bottom of linked page for a very slight idea of this monster.
http://www.lamars.com/products/donuts.html
It is beyond decadence. It is the donut that must surely be served at the feet of the Gods of Olympus.