Mushroom sauce
Mushroom Sauce
Ingredients: Velute sauce, essence of mushrooms, butter.
Mix two dessert-spoonsful of essence of mushrooms with a cupful of
veloute sauce, reduce, keep on stirring, and just before
serving add an ounce of butter. This sauce can be made with
essence of truffle[?], or game, or shallot.
Source: The Cook's Decameron: A Study In Taste, Containing Over Two
Hundred Recipes For Italian Dishes from a project that puts
out-of-copyright texts into the public domain. This is from a *very*
old source, and reflects the cooking at the turn of the last century.
Update as necessary.