Depending on region the recipe for the dish differs a bit:
Mr. Forgione's recipe differed from the picture in my head in one major way.
Some recipes differ from those in a cookbook only by the addition of liver to the ingredients.
Most recipes in the books differ somewhat from human fare.
In Las Vegas, the recipe for artifice differs with each hotel.
The recipe hardly differs from the one for Weißwurst although less pork rind and no parsley is used.
Process recipes will differ depending on the alloy composition.
How does this recipe differ from one for regular soap?
Sure, the exact recipes differ from place to place, like accents, but that's the point.
The popular recipes have varied with time and differ from one region to the next.