The dish traditionally was served directly inside the corn chip bag, but because the bag has become thinner, the dish is usually served on a plate.
According to the Dallas-based Frito-Lay company, the mother of Elmer Doolin, the founder of Frito-Lay, invented the dish in 1932.
It became popular during the 1970s, but today Frito pie gourmets make them in a casserole dish instead of in the bag.
Frito pie is essentially an Americanized version of the Mexican tostada – corn tortillas topped with ingredients similar to those used in Frito pie.
In 2010, judges at the State Fair of Texas selected Texas Fried Fritos Pie as the best-tasting entry.