Jack in the Box Wiki

The Monster Burger was a burger sold at Jack in the Box that was discontinued due to its role in the 1993 E. coli outbreak.


See also: 1993 E. coli outbreak

Health inspectors traced the contamination to the Monster Burger, which in January 1993 had been on a special promotion (using the slogan So good it's scary!) and sold at a discounted price.[1][2] The ensuing high demand "overwhelmed" the restaurants and the product was not cooked for long enough or at a high enough temperature to kill the bacteria.[3] Subsequent investigation by the Centers for Disease Control and Prevention (CDC) identified five slaughterhouses in the United States and one in Canada as "the likely sources of [...] the contaminated lots of meat."[4]


  • While the Monster Burger was discontinued, the Monster Taco  retains the "Monster" branding.
  • Jack in the Box rival Hardee's launched a product with the same name in 1997.[5] It became the "Monster Thickburger" in 2004.[6]


  1. Drexler, Madeline (23 December 2009). Secret Agents: The Menace of Emerging Infections (Revised ed.). New York, NY: Penguin Books. ISBN 9780143117179.
  2. Manning, Shannon D. (1 April 2010). Escherichia Coli Infections (2nd ed.). New York, NY: Chelsea House Publishers. ISBN 9781604132533.
  3. Green, Emily (6 June 2001). "The Bug That Ate The Burger". Los Angeles Times (Los Angeles). Retrieved 7 July 2013.
  4. Davis, M. (16 April 1993). "Update: Multistate Outbreak of Escherichia coli O157:H7 Infections from Hamburgers - Western United States, 1992-1993". Morbidity and Mortality Weekly Report (MMWR) (Atlanta, GA: Centers for Disease Control and Prevention) 42 (14).
  5. Young, Lisa R. (December 26, 2006). The Portion Teller Plan: The No-Diet Reality Guide to Eating, Cheating, and Losing Weight Permanently. Random House. ISBN 0767920791.
  6. Hardee's unveils new 'Monster'. CNNMoney. November 15, 2004.