Looking for a delicious and satisfying burger? Look no further than Gourmet Burger Joint J in downtown Madrid. This trendy burger joint offers a menu filled with gourmet burgers made with high-quality ingredients. From classic cheeseburgers and bacon burgers to unique creations like truffle burgers and avocado burgers, there is a burger for every taste at Gourmet Burger Joint J. The menu also includes a variety of sides, such as crispy fries and onion rings, as well as milkshakes and craft beers to complete your meal. With its modern decor and laid-back atmosphere, this burger joint is a must-visit for burger enthusiasts.