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'''Sour cream''' is cream that contains over 18% butterfat, which has been treated with a bacteria that produces lactic acid, giving it a slightly tart taste.
It is used in making dips and sauces, and is used in baking to provide moisture.
==References==
* [http://homecooking.about.com/od/milkproducts/a/sourcreamwhatis.htm Sour Cream - what is it ]