Sourdough Jack

What is it?

Built on two slices of grilled sourdough instead of a standard bun, this Jack in the Box burger sandwiches a beef patty with Swiss and American cheese, bacon, tomato, mayonnaise, and ketchup. Bread gets toasted on the griddle, so it comes with a browned exterior and a firmer, chewier bite than a soft burger bun. Unlike the chain's sesame-bun burgers, it leans on that sourdough tang for most of its identity. Double cheese setup gives you both melt and a nuttier note, while bacon and tomato add the usual salty and fresh pieces. It's a permanent menu item that stands apart mostly because of its bread choice.