In-N-Out Burger is a popular fast-food chain in the United States, known for its delicious burgers. The Double-Double is one of their most famous burgers, featuring two beef patties, two slices of American cheese, lettuce, tomato, and their signature spread. To make this burger at home, start by grilling or frying two beef patties until they are cooked to your liking. Then, toast two buns and spread the signature sauce on each side. Add the cooked patties, cheese, lettuce, and tomato, and enjoy!