Abstract: The effect of different proportion of lychee and apple juice on the sensory properties of the blended beverages was investigated. The blended beverage formulations were prepared by using an extreme vertex design of mixture design and optimized with response surface methodology. The sensory properties including aroma, taste, color and overall acceptable for the blended beverages consisting of A (water, 70~90%), B (lychee juice, 5~15%) and C (apple juice, 5~15%) were evaluated by 5-point hedonic scale sensory evaluation. The results showed that an optimum formulation which contained 70% of water, 15% of lychee juice and 15% of apple juice had a good sensory values with 4.19, 3.92, 4.12 and 3.73 for aroma, taste, color, and overall acceptable respectively, and it is agreement with the predictive values.