My mantra has always been 'don't mess with a good steak by marinating it', but this marinade is really yummy. I've used it on several different cuts, from less expensive chuck, flank and even brisket, along with sirloin and NY strip. The servings are flexible, depending on size of steaks and portion size. It does make a lot of marinade.Cook time doesn't include marinating time, and depends on how you like your steaks, ie: rare, med. or well done, and how thick the steaks are, so it was just a guesstimate.