I am not sure why you think crinkle-cut fries are extruded. they certainly don't have to be. They can be made by quarter-turning the potato before each pass over the corrugated blade. I have made them at home. I have bought crinkle-cut frozen fries for decades and they are not extruded. That does not mean that they can't be extruded, but I don't think the ones at Sonic (or Arby's, for that matter) are. I prefer crinkle-cut fries since they have more surface area than straight fries.
@Morledzep wrote:
I've never been a fan of crinkle cut fries.. mostly because they aren't actually cut potatoes but mashed potatoes put through an extruder. But the "groovy" fries are FAR better than those awful rubber things they used to sell, and it's a real nice change from tots.
Shopping South Jersey, Southeast Pennsylvania, and Delaware above the canal since 2008