NZ 599037 Disclosed is a whey-containing condensed milk composition which is obtained by carrying out heat sterilisation and concentration of a liquid whey formulation, wherein the liquid whey formulation is prepared by adding auxiliary materials containing sucrose to a liquid whey preliminarily heated at high temperature, wherein the preliminary heat treatment at high temperature is carried out under the temperature condition of 100 to 150 degrees Celsius for 1 to 30 seconds.