World Record of ‘most expensive hamburger’ has been achieved by the restaurant Serendipity-3 from New York City, USA.

On May 22, 2012; ‘the Le Burger Extravagant: most expensive hamburger set a record of most expensive hamburger was priced at $295. Generated profit was donated to The Bowery Mission, a nonprofit organization that feeds and assists the New York City’s homeless population. Hamburger was served on a gold-dusted campagna roll spread with white truffle butter, and the roll is topped with a blini, creme fraiche and caviar.