Two milk coffee beverages were prepared. We defined “Rich1” as the milk coffee beverage containing 6.5 wt% coffee beans (as unroasted coffee beans) and 8 wt% milk. “Rich2” is another milk coffee beverage that contains 7.0 wt% coffee beans (as unroasted coffee beans) and 12 wt% milk. The two kinds of roasted coffee beans used were Coffea Arabica (Colombian EX) and Robusta (Indonesian AP-1). As the roasting of coffee beans is proceeding, the color of coffee beans change into dark brown. We generally use the Hunter’s Lab color space as an index of the degree of roasting, because the degree of roasting correlates closely with the light value. We can easily measure the light value with the Hunter color difference meter. The light values (LV) of 20 and 28 were used for “Rich 1”, and that of 20, 22, 24, 26 and 28 were used for “Rich 2” milk coffee beverages. Sucrose palmitic acid ester (RYOTO™ Sugar Ester P-1670; HLB 16, with a monoester content of 80%) was used as an emulsifier.