McDonald’s uses a brand of sausage patties that’s exclusive to the company.  The recipe’s a closely guarded secret, and you can’t buy them unprepared from either the store or the company’s supplier. Curiously enough, in my research for this article I discovered an interesting Quora post on this topic. A user there ordered a case of frozen Jimmy Dean sausage parties, and they bore a remarkable resemblance to those famous McDonald’s patties. I can’t guarantee this is proof-positive! If you’re looking for a brand of sausage patties that are at least a lot like McDonalds’ though, this might be a good lead to follow...