Two hours. According to official website, the Yuanzu Snow Moon Cake can be kept for two hours at room temperature. Yuanzu Snow Moon Cake is a series of Yuanzu Mid-Autumn Moon Cake. Different from ordinary moon cakes, the filling of snow moon cakes is ice cream. Crispy and rich milk flavor, with delicious pulp such as strawberry, mango and macadamia nut, rich in taste.