The Asador Aupa restaurant in Spain serves the world’s most expensive and exclusive burger. It costs $11,000 and can only be experienced by those invited by the restaurant.

Burgers have gotten considerably more expensive in recent years, but they remain among the most affordable food items on restaurant menus. There are a few exceptions, though, the most notable of which recently claimed the title of ‘the world’s most expensive burger’. Thought up by the chefs at Asador Aupa, a Basque cuisine eatery located in Cabrera del Mar, Catalonia, this exclusive treat reportedly took eight years of research and experimentation to develop, and its exact ingredients remain a secret. All we know is that the burger’s heart-stopping €9,450 ($11,000) price tag isn’t linked to gimmicky and meaningless ingredients like edible gold, but to quality ingredients, a unique dining experience, and exclusivity.