Sauce bourguignonne (French pronunciation: [sos buʁɡiɲɔn]; lit.
'Burgundy sauce') is a French sauce with a base of red wine with onions or shallots, a bouquet garni (parsley, thyme and bay leaf), reduced, strained, and mixed with some espagnole sauce.
Just before serving it is mounted with butter and seasoned lightly with cayenne pepper.
Like all red wine sauces, it may have some mushrooms added during cooking to enrich the flavour.
The onions or shallots are sautéed in the pan and the red wine is added which is used to dissolve and incorporate the residue from the cooking of the meat.