1381 Diuersa Servicia in C. B. Hieatt & S. Butler (1985) 74 For to make egerduse, tak lucys or tenchis & hak hem smal..nym vineger & þe þredde perty of sugur & myncyd onyons smal, & boyle al togedere, & cast þereyn clowys, macys & quibibz.
a1425 (a1399) Forme of Cury (BL Add.) 23 in C. B. Hieatt & S. Butler (1985) 102 Egurdouce. Take connynges or kydde... Take rede wyne..sugur with powdour of peper, of gynger, of canel, salt [etc.].
c1450 in T. Austin (1888) 71 (MED) Browne in egurdouce.
1808 II. 149/2 Receipt for dressing ‘Brawne in Eger-douce’, by a newer Hand.]
1846 J. O. Halliwell I Egredouce, a kind of dish or sauce, frequently mentioned in old cookery books.
1869 Aug. 321 Plenary court..Held King Leodegan that Whitsuntide. By noon the busy cooks had served in hall..Boars' heads in aigredouce.
1956 32 771 I would call attention here to the many other recipes given in full, e.g...egredouce.
1984 R. Feild ii. 19 Egerdouce was a favourite: a sweet-sour pottage in which goat meat, coney or sliced brawn was cooked in a sauce of young red wine or vinegar, honey or sugar, and dried fruits.
1999 (Nexis) 30 Nov. 3 The exotic fare included: egerdouce, a sauce made with onions, currants, raisins and vinegar.