In Tex-Mex cuisine, what cheese sauce is commonly called simply “queso”?

In Tex-Mex cuisine, the cheese sauce commonly called “queso” is chile con queso.

The name means “chile with cheese” in Spanish. Tex-Mex chile con queso is typically a warm, smooth dip made with melted cheese and chiles, often accompanied by tortilla chips. Tomatoes, onions, milk, or cream may also appear in recipes.

Restaurant queso is frequently prepared with processed cheese or a cheese blend because these ingredients melt smoothly and remain pourable. The dish differs from fresh Mexican cheeses such as queso fresco, which are generally crumbly and are not used as the same kind of dipping sauce.

Although recipes vary, the essential idea is melted cheese flavored with chile. “Queso” alone literally means “cheese,” so the shortened restaurant term depends on the Tex-Mex context.