Mmmmmmm, I miss that flavor. And @rvwnsd you are correct. Potatoes from Ore Ida, Simplot and most major processors wtould blanche potatoes in a beef/fat/tallow before freezing.
Then....at the restaurants a beef/tallow enhanced shortening would be used to fry these delicious spuds!
Oh, and never, ever give me fries that have been sprayed with cornstarch/flavor enhancers. Many chains have tried these...they are superior for staying crispy longer in the bag/box, and external spices and flavors can be added. But they turn me off, horrible texture, rough tongue/mouth feel. A few major chains have tried and failed at these as their mainline fries.