The 'Quintessential Grilled Cheese' served by New York-based restaurant Serendipity 3 for $214 (approx ₹14,300) is the most expensive sandwich ever, according to Guinness World Records. The ingredients of the sandwich include bread made with Dom Perignon champagne and 24 karat edible gold flakes. It is served on a Baccarat Crystal plate with lobster tomato bisque as a dipping sauce.