Sour cream is essentially fermented heavy cream. It has a creamy texture and looks almost similar to yogurt. The difference between these 2 is that sour cream is made using the cream while yogurt is made using milk. Sour cream is widely used in cooking and baking. It is a common ingredient in cheesecakes and lends a creamy texture to the cheesecakes. In normal cakes, sour cream helps the cakes bake with a lovely moist texture, and adds a wonderfully rich flavor, thanks to its creamy texture and slightly tangy flavor. Sour cream can be purchased from the milk and dairy section in most stores. It does not typically have a very long shelf life and should be kept refrigerated at all times.