This invention is directed to an acid beverage composition, comprising; (A) a hydrated protein stabilizing agent; (B) a protein material; (C) a triglyceride comprising a vegetable oil triglyceride, a genetically modified vegetable oil triglyceride or a synthetic triglyceride oil of the formula 1 wherein R.sup.1, R.sup.2 and R.sup.3 are aliphatic groups and contain from about 7 up to about 23 carbon atoms; and (D) a flavoring material comprising a fruit juice, a vegetable juice, glucono delta lactone, phosphoric acid or the sodium salts or acids of citric acid, malic acid, tartaric acid, lactic acid and ascorbic acid; wherein the acid beverage composition has a pH of from 3.0 to 4.5. Also disclosed is a process for preparing an acid beverage composition.