Fry sauce is usually a mix of ketchup and what condiment?

Fry sauce is usually a mix of ketchup and mayonnaise.

The simple combination produces a creamy, tangy pink sauce served with French fries, burgers, and other fried foods. Recipes vary: some use equal parts ketchup and mayonnaise, while others add mustard, vinegar, garlic, spices, or pickle relish.

Fry sauce is especially associated with Utah, where restaurateur Don Carlos Edwards is credited with popularizing a pink sauce at his restaurants in the 1940s. His sauce later became closely linked with Arctic Circle, a Utah-based fast-food chain that opened its first restaurant in Salt Lake City in 1950.

The mixture has relatives around the world. Argentina and Uruguay have salsa golf, Puerto Rico has mayokétchup, and Heinz marketed a similar product as Mayochup in 2018. These sauces may contain extra ingredients, but plain fry sauce is defined by its ketchup-and-mayonnaise base.