Delmonico's was the most famous restaurant in NY during the gilded age. Among their most famous dishes was their signature "Demonico" steak. Unfortunately the identity of the exact cut is lost to history. I read an article on this, and IIRC, the most popular guess is a bone-in rib steak. However, it's a guess and there are others. Me? I hope it's true because that's my favorite steak. I'd like to think I was in on the action with Commodore Vanderbilt, Fiske, Gould and Diamond Jim Brady.
Today, the most you can stay about it is that it's NOT a standard butcher's term. However, regionalism in meat cut names is still strong in the U.S., and "Delmonico" might mean something very specific in Syracuse.
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Klose Steak Grill with Swing Set
Backwoods Fatboy with DigiQ II