Definitions for "Beurre noir"
Keywords:  capers, parsley, butter, vinegar, lemon
(burr-nwahr) (French) Butter cooked to a dark brown.
This term means "black butter" and describes butter cooked over low heat until dark brown and then flavored with vinegar or lemon juice, capers and parsley.
A tart sauce made with browned butter mixed with vinegar.