Meaning of beurre blanc

beurre blanc

Pronunciation: (bûr' blängk' Fr. bœr blän'), [key]
— French Cookery. French Cookery.
  1. a reduction sauce of wine vinegar and shallots, cooked with butter and beaten until thick and foamy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.