beurre noir

[ bur nwahr; French bœr nwar ]
/ ˈbɜr ˈnwɑr; French bœr ˈnwar /

noun French Cookery.

a sauce of darkly browned butter, sometimes flavored with herbs, vinegar, etc.

Origin of beurre noir

1855–60; < French: literally, black butter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019