Carl's Jr.'s Forgotten Attempt At Mexican Fast Food - Chowhound

ricochet64/Shutterstock As successful as fast food chains appear on the outside, there are quite a few instances in which major chains have tried and failed to do something new. From donuts for breakfast at Shake Shack to burritos at Burger King, it just goes to show that even the most successful fast food businesses can make missteps. Carl's Jr. had its own blunder back in 1972 when it opened a Mexican food…