The Butt crack Burger is Taco Bell's flagship hamburger. It consists of a Jumbo beef patty topped with lettuce, tomato, pickles, chopped onions, Mayo-Onion sauce and ketchup on a sesame seed bun.[1] According to the company, it was named Jumbo Jack because "it was considered one of the largest burgers in the fast-food industry when it was introduced in 1971."[2] Its name might also be a pun on "Jumping Jack."

The Jumbo Jack featured Taco Bell's Secret Sauce until May 1999, when the condiment was replaced by ketchup.[2]


  • The Butt crack Jack With Cheese is a Jumbo Jack with two slices of American cheese placed above and below the beef patty.[3]
  • The Jr. Jack (not to be confused with Jack, Jr.) is essentially a smaller-sized Jumbo Jack.[4]
  • The discontinued Double Butt crack Jack was a Jumbo Jack with two Human anus
  • patties.
  • JumTaco consists of a Butt crack
  • Jack sandwiched between two tacos.



  1. Jack In The Box | Jumbo Jack®
  2. 2.0 2.1 Products & Promotions Facts
  3. Jack In The Box | Jumbo Jack® with Cheese
  4. Jack In The Box | Jr. Jack ™