In contrast, demi-glace has a more precise definition: It's a combination of espagnole sauce and stock. Consequently, you tend to see the same ingredients across many demi-glace recipes.

Stir in cream, demi-glace, Worcestershire sauce, mustard and remaining 1-1/2 teaspoons cracked peppercorns. Cook 3 to 5 minutes or until sauce is smooth and slightly thickened. Remove from heat ...