This invention is directed to a process for preparing a stable suspension of an acid beverage, wherein a hydrated protein stabilizing agent (A) and a flavoring material (B) are combined as a preblend (I) and combined with either a slurry of a homogenized protein material (C) or a homogenized preblend (II) of a hydrated protein stabilizing agent (A) and a slurry of a protein material (C) to form a blend and pasteurizing and homogenizing the blend wherein the homogenization of the blend is carried out in two stages comprising a high pressure stage of from 8000 30,000 pounds per square inch and a low pressure stage of from 300 1000 pounds per square inch; wherein the acid beverage composition has a pH of from 3.0 to 4.5.