After the step of mixing by adding the aqueous solution of the water-soluble minerals in water or a mixture of water and fat which contains an emulsifier having high hydrophilicity or fat was emulsifiers highly hydrophilic, and other proteins or protein oil-in-water which comprises the step of heat sterilization process and a nutritional supplement, wherein the ratio of medium-chain fatty acid of the total fatty acids composition of the fat is less than 100% by weight more than 0.1% by weight The method for producing a type emulsified food composition, for any agglomerates or phase separation after heat sterilization and to suppress foaming preparation time of the oil-in-water type emulsified food composition, its occurrence can be greatly reduced, further, vitamin In the case of containing the likely components to oxidation and Louis, it is possible to provide a method of manufacturing can maintain their stability during storage, the oil-in-water type emulsified food composition of high quality. None [Selection Figure]親水性の高い乳化剤を含有させた油脂又は親水性の高い乳化剤を含有させた油脂と水との混合物を水又は水溶性ミネラル類の水溶液に添加して混合する工程の後に、蛋白質または蛋白質とその他の成分を添加する工程および加熱殺菌する工程を含み、更に前記油脂の全脂肪酸組成中の中鎖脂肪酸の割合が0.1重量%より多く100重量%未満であることを特徴とする水中油滴型乳化食品組成物の製造方法により、水中油滴型乳化食品組成物の調合時の発泡を抑制し、かつ加熱殺菌後に相分離や凝集物がないか、その発生が極めて低減され、更に、ビタミン類などの酸化し易い成分を含有する場合には、保存中のそれらの安定性を保持することができる、高品質な水中油滴型乳化食品組成物を製造する方法を提供することができる。【選択図】なし