"There's been a lot of unusual burgers," said Fieri, recalling his culinary travels. "At The Triple XXX in West Lafayette, Indiana, across from Purdue University, they put peanut butter on a burger. People order it, people like it and -- whatever floats your boat."
The Triple XXX has been serving unique burgers -- such as its Duane Purvis All-American. The sandwich is named after a Purdue football player who played from 1932 to 1934. "Add thick creamy peanut butter on the lower deck and you're in for the touchdown!" says the menu.