Эмульсияланған май соусы: Беурр Блан және оның түрлері

Emulsified butter sauce

Beurre blanc ("white butter" in French) or Beurre Nantais is a warm emulsified butter sauce made with a reduction of vinegar and/or white wine (normally Muscadet) and shallots into which softened whole butter is whisked in off the heat to prevent separation. The small amount of emulsifiers naturally found in butter, including a trace of lecithin, is used to form an oil in water emulsion. Although similar to hollandaise in concept, it is considered neither a classic leading nor compound sauce. This sauce originates in the cuisine of the Loire Atlantique department.

The chef Clémence Lefeuvre (née Clémence Prau) invented beurre blanc, apparently by accident, sometime around the beginning of the 20th century. She served this sauce at her restaurant "La Buvette de la Marine" in the hamlet of La Chebuette in the village of Saint Julien de Concelles on the banks of the Loire River a few kilometers upstream from Nantes. Legend holds that she intended to prepare a béarnaise sauce to go with pike but forgot to add the tarragon and egg yolks. Some sources claim that this invention occurred while she worked as a cook for the Marquis de Goulaine at Château de Goulaine. Aristide Briand, long time prime minister of France and Nobel Peace Prize laureate, said at her death in 1932 that it "was a bit like national mourning." Small cubes of cold butter are then gradually incorporated and as the butter melts the mixture is whisked. The sauce can separate by either overheating or cooling. If it heats past , some emulsifying proteins begin to break down and release the butterfat they hold in an emulsion. The butterfat will solidify if the sauce cools below .

Beurre rouge (English: "red butter") is a variant of the beurre blanc sauce that is prepared by substituting a dry red wine for the white wine and red wine vinegar for the white wine vinegar.