Zip Sauce from Detroit?

My co-worker was raving about this thing called "Zip Sauce" which accompanies steaks in Detroit. From what he describes, it's basically an amalgamation of gristle, soy sauce, and a "secret ingredient" into which you dip your steak.
Anyone heard of this? If so, what is this secret ingredient? And, as it pertains to Chicago-chowing, does anyone carry this or something similar around town?

I worked in Detroit for a number of years and I have heard and served "Zip Sauce" , but it was a while ago, and I'm not certain when and where. Or more importantly, whom was the chef.
I seem to recall that a chef I had worked for, Jimmy Schmidt, offered it. He grew to fame cooking at the London Chop House, which in the 70's was Detroit's premiere restaurant.
I will ask around if I can find a recipe.

found this online: http://www.askyourneighbor.com/recipes/199.htm

ingredient list:

ZIP SAUCE LIKE ANDIAMO'S (Gloria Pitzer)

1 t. crushed dried rosemary
1/4 t. dry thyme leaf, rubbed between fingers til fine
1/4 t. garlic powder
1 t. dry minced parsley
1/4 lb. butter, melted
1 t. salt
1 T. Dijon mustard
1/2 t. coarse black pepper
1 1/2 T. Worcestershire sauce
1/4 t. ground cumin
1/8 t. cayenne pepper
1/8 t. white pepper

Hey--thanks. I guess there was a mite more to it than soy sauce, fat, and something special.
I wonder if this is merely a regionally Motown thing or not?

I grew up in Detroit, and I would describe the typical zip sauce as being a lot more like this recipe:

Zip sauce

3 cups water
1/4 cup Maggi Liquid Seasoning
2 tablespoons beef base
1 teaspoon pressed garlic

In a saucepan over medium high heat, combine ingredients. Heat to a gentle boil for 1 minute. Strain. Use a 1 ounce ladleful of sauce on any grilled meat item.

I think the name is the regional thing. Lots of places around the country serve their meat in a similar sauce, which may be called "au jus." I think if you order a steak at many Greek diners around Chicago, it'll come swimming in something like this.

Just read the postings on the infamous 'Zip Sauce' that is found in and around Detroit. I do not think there is a definitive recipe for this sauce. It is usually a mix of spices and butter etc.

Let me see if I can dig up some local recipes that I consider good.

I myself, like everyone else who has had this sauce, knows it a valuable commodity for a steak lover. the closest thing I have found without producing solution myself, is offered at www.originalzipsauce.com. Just add 1/4 stick of butter and 3 oz. of this stuff and you are golden! Enjoy.

PS....for those in the Detroit area, it can be found at Holiday Markey in Royal Oak or Papa Joe's in Birmingham. Otherwise, check your local specialty type grocery stores.