Nachos are a Tex-Mex culinary dish consisting of tortilla chips or totopos covered with cheese or cheese sauce, as well as a variety of other toppings and garnishes, often including meats, vegetables, and condiments such as salsa, guacamole, or sour cream. At its most basic form, nachos may consist of merely chips covered with cheese, and served as an appetizer or snack, while other versions are substantial enough as a main course. The dish was created by, and named after, Mexican restaurateur Ignacio Anaya, who created it in 1943 for American customers at the Victory Club restaurant in Piedras Negras, Coahuila.

Tex-Mex cuisine is a regional American cuisine that originates from the culinary creations of Tejano people. It has spread from border states such as Texas and others in the Southwestern United States to the rest of the country. It is a subtype of Southwestern cuisine found in the American Southwest.