Flavouring a Brown Sauce

Once the sauce has thickened and been skimmed (see step 3), you can add liquid flavourings, such as the Madeira shown here, or wine or Worcestershire sauce. Solid additions such as chopped onions, herbs or bone marrow, can also be included. To prepare marrow before adding it to the sauce, poach a marrow bone in water for 2 minutes, then drain. When cooked in the sauce, the marrow will melt.