beurre blanc

[bur blahngk; French bœr blahn]

noun French Cookery.

a reduction sauce of wine vinegar and shallots, cooked with butter and beaten until thick and foamy.

Origin of beurre blanc

1930–35; < French: literally, white butter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019