Tex-Mex cuisine is characterized by its heavy use of shredded cheese, beans, meat (particularly chicken, beef, and pork), chili peppers, and spices, in addition to flour tortillas.
[6] The cuisine that would come to be called Tex-Mex originated with Tejanos as a mix of native Mexican and Spanish foods when Texas was part of New Spain and later Mexico.
[7] From the South Texas region between San Antonio, the Rio Grande Valley and El Paso, this cuisine has had little variation, and from earliest times has always been influenced by the cooking in the neighboring northern states of Mexico.
In the 20th century, as goods from the United States became cheap and readily available, Tex-Mex took on such Americanized elements as Cheddar, jack, and pimento cheeses.
[6] A 1968 Los Angeles Times feature wrote "[i]f the dish is a combination of Old World cooking, hush-my-mouth Southern cuisine and Tex-Mex, it's from the Texas Hill Country.
[12] According to restaurateur Claude Benayoun, business had been slow, but after the 1986 release of the film Betty Blue, which featured characters drinking tequila shots and eating chili con carne, "everything went crazy.
[13] Minor local variations on Tex-Mex in these areas are to use gouda cheese, or to substitute taco shells with stuffed pita breads.
[15][16] The Oxford English Dictionary supplies the first-known uses in print of "Tex-Mex" in reference to food, from a 1963 article in The New York Times Magazine, and a 1966 item in the Great Bend (Kansas) Tribune.