Yes, there are sour desserts. Examples include lemon meringue pie, key lime pie, cranberry sorbet, passion fruit mousse, and strawberry rhubarb crisp. These desserts are tart and sweet, and can be enjoyed as a treat or at the end of a meal. Keywords: sour desserts, lemon meringue pie, key lime pie, cranberry sorbet, passion fruit mousse, strawberry rhubarb crisp.