Sour Cherry and Syrup by Luca Tenti is a delicious product, made with whole sour cherries processed within a few hours of harvesting. Sour Cherry and Syrup: how it's made The freshly picked sour cherries are selected and then immediately processed. The whole fruits are mixed with sugar and placed in sealed containers. A maceration phase occurs between the sour cherries and the sugar, naturally producing a sweet syrup. The product is then jarred and pasteurized.