According to Daily Mail of August 9, the world's most costliest pudding is up for sale at 15,730 pounds at New York's famous Serendipity 3 restaurant. The 630-pound Grand Opulence Sundae and the mind-boggling 15,730-pound Frrrozen Haute Chocolate According to Guinness are the most expensive puddings in the world, according to Guinness.