Adopted recipe. Please note that this is not a sweet BBQ sauce at all. If you are looking for a "Memphis" or "Kansas City" style sauce, with tomatoes and molasses or brown sugar, please look elsewhere or you will be disappointed.
Eastern North Carolina is where you would find the original inspiration for this. Traditionally, a whole hog is cooked and this style of sauce is used both for the mop and on the side. I really like this stuff, it's a nice change from sweet sauces and makes a dynamite mop, as well.
Keeps in a covered container in the fridge almost indefinitely.