Abstract: An oil-in-water type emulsified food is prepared by mixing an aqueous phase material containing at least egg and vinegar, then emulsifying the mixed aqueous phase material with an oily phase material comprising more than 20% by weight of a fat/oil having a melting point lower than 0° C. The resulting oil-in-water type emulsified food has more stable physical properties, and has a percentage change in elastic modulus which is at most 10%. The relationship between the mixing time and temperature may also be determined based on the following: a) when the mixing temperature, T, is 30 to 55° C., the mixing time in minutes, t, is calculated by the formula t =106×eaT, and the coefficient a is from −0.2 to −0.3; and b) when the mixing temperature is 0 to 15° C., the mixing time is from 1 day to 1 week.