Jack in the Box went through 60 different versions of its new burger before landing on the final recipe

• Jack in the Box's new Smashed Jack burger sold out in two weeks and is currently impossible to find.
• It took two years to develop the burger, which features a ¼-pound smashed-style beef patty. 
• Chief marketing officer Ryan Ostrom told BI he tried up to 60 different versions of the burger.

It's been eight years since Jack in the Box released a new burger, and the Smashed Jack is already making a huge splash.