The ingredients needed to prepare chef Gordon Ramsey's Steak Diane include four small sirloin steaks of about 7 ounces each, three peeled shallots, 4 ounces of crimini or button mushrooms and one peeled garlic clove. The recipe also calls for one tablespoon each of salted butter and Dijon mustard.
Additional seasonings and thickenings are one to two tablespoons of Worcestershire sauce, 1/3 cup of brandy or cognac, a cup of heavy cream and a small bunch of flat-leaf parsley.
The ingredients for Julia Child's Steak Diane differ slightly. Child prefers to start with rib eye steaks rather than sirloin. Her sauce contains fewer ingredients than chef Ramsey's, relying only on one to two tablespoons of minced shallots, three tablespoons of clarified butter, a tablespoon of Dijon mustard and 1/4 to 1/3 cup of beef stock. She also tops the dish with parsley.
Preparation of both recipes involves trimming the fat from the steaks and pounding or rolling them until they are thin. The steaks are quickly sautéed and set aside while the sauce is prepared. The sauces are prepared by sautéing the vegetables in olive oil or butter and adding the rest of the ingredients to complete. Serve the dish with the chosen sauce spooned over the steaks, and top with fresh parsley.