It's been almost 35 years but as I recall it was just a dry seasoning with tenderizer it - maybe similar to the Fiesta Uncle Chris' Steak Seasoning you can get at HEB.
I was a cook at Quincy's before college. We had the best breakfast buffet in town because Spartan Foods also owned Hardees. The same lady would make biscuits for the two restaurants starting at 3:00 am each morning.