Comes from Little Britain (BBC, Matt Lucas/David Walliams, 2003-05), specifically the Marjorie Dawes character. Dawes, played by Lucas, runs a "Weight Watchers"-style weight loss program, "Fat Fighters". In one episode, seh asked the group "What foods can we get cravings for?". One member said "Cohcolate", and Marjorie wrote "Choclit" on the white-board.
"We all like Choclit Cake"