The world’s most expensive burger has made its debut at New York’s Serendipity 3 restaurant. The Guinness Book of World Records has given the title to the burger at $295 (Dh1,100 approx). According to the Guiness World Records website, the burger boasts a patty of Japanese Waygu beef infused with 10-herb white truffle butter and seasoned with Salish Alderwood smoked Pacific sea salt. It\'s topped with cheddar cheese, hand-made and cave-aged for 18 months by cheesemaker James Montgomery of Somerset, England. Then come the shaved black truffles, a fried quail egg, a blini, creme fraiche, Kaluga caviar and a white truffle-buttered Campagna roll. Last but not the least, a solid gold \"Fleur de Lis\" toothpick, encrusted with diamonds, designed by world-renowned jeweller Euphoria New York.