Sour cherries have such a narrow window of opportunity. Wait for them to get ripe.....hurry and get them picked before the birds gobble them up.... Last weekend, I made a cherry clafouti at my parent's house, and then back at home, made sour cherry jam. There's one jar earmarked especially for a certain brother-in-law. There's a huge bag of sour cherries in the freezer, that need to be made into my favorite.... dried sour cherries. They are so yummy, I ration them.