I found this place completely by chance while driving from Boston to Seattle. It turned out to be the best meal of the trip. In barren South Dakota I had gotten off I-90 expecting to eat some sort of soggy, uninspired gas station sandwich when I spotted this small orange building with its "Drive-In" sign.
The menu is eclectic (burgers, tacos, chicken) and I was advised by the young girl working behind the counter to order the "Broasted chicken." The smile that came across her face when she said "It's really good" spoke toward the quality of the meal to come.
The Murdo Drive-In makes its chicken (and probably the rest of its food) to order and its website says, "We are not fast! We are good, We are cheerful, We are Courteous, But, we are not fast! For fast, go to Chicago." Love it or leave it I guess! The chicken took close to 20 minutes to arrive at our table but when it did, the skin was still singing from the hot oil. Every maxim you hear applied to a perfectly fried chicken applies here: crispy, tender, moist, succulent, etc. Divine.
It was accompanied by a perfectly balanced coleslaw accented by the presence of what I believe was horseradish. The fries were wonderful. The meal attained legendary status when I went back in for dessert; I had to see what they had to offer. I ordered a rhubarb "cyclone" (a thicker milkshake) which was only available because, sensibly, rhubarb was then in season. The cyclone was delicious, from its creamy substrate to the tangy threads of freshly harvested rhubarb.
The freshness and lightness of what could have been a heavy, greasy meal cannot be overstated. I hadn't expected much from South Dakota's Roadfood, but this meal proved otherwise. An essential Roadfood stop!