Chile con queso

Chile con queso , sometimes simply called queso, is an appetizer or side dish of melted cheese and chili peppers, typically served in Tex-Mex restaurants as a dip for tortilla chips. Chile con queso (also spelled chili con queso) is a part of Tex-Mex and Southwestern cuisine. Chile con queso is probably a derivative of queso flameado from the northern Mexican state of Chihuahua. Chile con queso is predominantly found on the menus of Tex-Mex restaurants in the southwest and western United States.

Source: Wikipedia