Jack In The BoxSourdough Bread instead of a Regular BunSourdough BreadAsk nicely if they can swap out the regular hamburger bun for some crispy Sourdough Bread. You may just get lucky!All Locations6 - High$0.29http://hackthemenu.com/jack-in-the-box/secret-menu/sourdough-bread/You've probably heard of the Sourdough Jack, the Jack in the Box burger made on grilled sourdough bread, but did you know you can customize anything on the menu with that same bread? It's true. Jack in the Box makes many sandwiches with their famous " Sourdough Bread ", another item on the Jack in the Box secret menu. So, if you're not a fan of the sesame seed bun, you can try sourdough bread on any of the sandwiches! Any Jack in the Box burger or sandwich can be ordered on sourdough bread . So try all the different combinations! Be sure to check out the Jack In The Box Secret Menu as well as visiting our home page to check out the complete list of All the Secret Menus from all your favorite restaurants!