According to the Guinness Book of World Records, the world’s most expensive pizza is a thin crust, wood fired pizza from Gordon Ramsay’s Maze restaurant in London, UK. Toppings on this £100 ($168) pizza include onion puree, white truffle paste, fontina cheese, baby mozzarella, pancetta, cep mushrooms and freshly picked wild mizuna lettuce, topped with shavings of a rare Italian white truffle.