To provide a high clarification technology of a beverage on the premise that acid milk is included.SOLUTION: The method comprises the steps of: preparing acidic milk containing milk protein and having a pH of less than 3.5 heat sterilizing said acidic milk at a temperature of 95 C to 130 C inclusive And a step of lowering the liquid temperature so that the liquid temperature of the acidic milk is 45 C. or less, and in the step of lowering the temperature, a temperature at which the liquid temperature is 55 C. or more and less than 95 C. The acid milk is cooled so that the time in the region is less than 2 minutes and the absorbance of the acid milk measured at the wavelength of 650 nm measured after the step of lowering the temperature is 0.02 or less.Selection drawing None【課題】酸性乳を含むことを前提とした飲料の高清澄化技術を提供する。【解決手段】乳タンパク質を含み、かつpHが3.5未満である酸性乳を準備する工程と、95℃以上130℃以下の温度で前記酸性乳を加熱殺菌する工程と、前記加熱殺菌する工程の後、前記酸性乳の液温が45℃以下となるように前記液温を降温させる工程と、をこの順で含み、前記降温させる工程において、前記液温が55℃以上95℃未満の温度領域にある時間が2分未満となるように前記酸性乳を冷却し、前記降温させる工程の後に測定した前記酸性乳の波長650nmにおける吸光度が0.02以下である。【選択図】なし
