The Sauce Every Utah Road Trip Ends Up Arguing About

Somewhere around day two of a Utah road trip, a kid in the back seat asks for fry sauce, and if you do not know what that is yet, you are about to.

Fry sauce is mayonnaise and ketchup mixed together, and Utah will tell you, correctly, that it invented it. The story goes back to an Arctic Circle restaurant in Provo in the mid 1950s, where two employees named Ron Taylor and Max Peay mixed up a batch on a slow night shift. It got refined a few years later by a franchisee in Las Vegas who blended ketchup straight into the chain’s own burger sauce to save a step, and when the company founder found out, he was annoyed for about five minutes and then put it on the menu everywhere. It has been a fixture of the state ever since, on fries obviously, but also on burgers, tots, and whatever else needs dipping.

You will find fry sauce at almost any drive-in in Utah, but the place I point people to is Milt’s Stop and Eat in Moab. It has been open since September 1954, which makes it older than the fry sauce story itself in some tellings, and it is still the oldest running restaurant in town. Get the buffalo burger if you want the local version of a classic, ask for fry sauce on the side, and prepare for every kid in the car to demand it for the rest of the trip.

We hit Moab on our own drive through years ago, cooler and tent still in the back of the car, coming off a very cold night camping at Arches. A hot meal in a town that has been feeding road trippers since the Eisenhower administration is exactly what that kind of morning calls for.

Fry sauce is not the only food worth building a stop around. Navajo tacos, fry bread topped with beans, meat, cheese and lettuce, show up at trading posts and small cafes across southern Utah near tribal lands, and they are a completely different food story, tied to Navajo and Southern Paiute communities rather than a 1950s drive-in. Try one if you see it on a menu near Kanab or Bluff. It is a good thing to talk to your kids about while you eat it, why it exists and what it represents, not just that it tastes good.

The reason a sauce this simple matters is the same reason a lot of regional food does. It tells you something true about the place. Utah’s food identity does not run through fine dining, it runs through drive-ins, diners, and small towns built around getting outdoors, and fry sauce is the one thing that shows up on every menu in that world, unpretentious and completely unbothered by what anyone outside the state thinks of it.

If you are building a Mighty Five itinerary and want the full list of where to eat between the parks, from Boulder and Torrey near Capitol Reef to the small towns along Scenic Byway 12, I cover the road trip logistics and current fees in our Utah guide, and the Zion specific side of things, shuttle, permits, river flow, is on the Zion page.