Genevoise sauce is a type of French brown sauce made from fish fumet, mirepoix, red wine, and butter usually accompanied with fatty fishes such as trout and salmon.[1] Some versions use white wine instead of red wine.
The sauce was originally made from the braising liquid from dishes prepared "à la genevoise". One of the first recipes for the sauce was given by the eighteenth-century French chef and writer Louis Eustache Ude who used white wine instead of red wine.[2]
This sauce was later further popularized by the French chef Auguste Escoffier in his book Le guide culinaire.[3]