Tex-Mex (from Texan and Mexican) is a term describing a fusion of United States cuisine and Mexican cuisines, deriving from the culinary creations of Tejanos. It has spread from border states such as Texas and others in the Southwestern United States to the rest of the country as well as Canada. Tex-Mex is most popular in the state of Texas.
Tex-Mex is often conflated with the Southwest cuisine found in Arizona, New Mexico, Colorado, and Utah, but it is different.
Some ingredients are common in Mexican cuisine, but other ingredients not typically used in Mexico are often added. Tex-Mex cuisine is characterized by its heavy use of shredded cheese, meat (particularly beef and pork), beans, and spices, in addition to Mexican-style tortillas. Dishes such as Texas-style chili con carne, nachos, and fajitas are all Tex-Mex inventions. Moreover, Tex-Mex has imported flavors from other spicy cuisines, such as the use of cumin, introduced by Spanish immigrants to Texas from the Canary Islands and used in Berber cuisine, but used in only a few central Mexican recipes.
The word "Tex-Mex" first entered the English language as a nickname for the Texas Mexican Railway, chartered in southern Texas in 1875. In train schedules published in the newspapers of the 19th century the names of railroads were abbreviated. The Missouri Pacific was called the Mo. Pac. and the Texas-Mexican was abbreviated Tex. Mex. In the 1920s, the hyphenated form was used in American newspapers in reference to the railroad and to describe Texans of Mexican ancestry.