The purpose of the present invention provides a dairy product and producing method thereof, in which the dairy product is room temperature storage type and browning variation will not be generated even though stored at room temperature for a long time.The solution of the present invention is a dairy product suppressed in browning variation which is characterized by homogenizing a milky composition of an oil-in-water type emulsified mixture comprising lactoprotein, saccharides, emulsifier, and 50 % of the oil-in-water emulsified mixture has a particle size of 0.2 ~ 1.0 μm after the treatment of homogenization.本發明之課題在於提供一種乳製食品及其製造方法,該乳製食品為常溫保存型,即使於常溫、長期保存後亦不會產生褐色變化。本發明之解決手段係一種抑制褐變乳製食品,其特徵在於:將含有乳蛋白質、醣類、乳化劑之水中油型乳化物之乳性組成物均質化處理,且均質化處理後該水中油型乳化物之50%粒徑為0.2~1.0μm。