For those of you who don’t know, Discworld is a comedic fantasy book series by Terry Pratchett. Each book is set on the Discworld, a flat world balanced on the backs of four elephants which, in turn, stand on the back of a giant turtle, Great A'Tuin.
Unfortunately, I don’t know who made this awesome cake.
The caption on the cake isn’t a typo. It’s a reference to a scene from Carpe Jugulum:
Magrat Garlick's given name is a misspelling; it was supposed to be Margaret, but her mother was too shy to make sure the priest got it right. So when Magrat's daughter was to be named, she spelled the child's name out carefully and added a little note to the priest about it. He was so nervous, never having conducted the ceremony before, that he formally and irrevocably pronounced the infant "Esmerelda Margaret Note Spelling of Lancre.”