Sour cream is a dairy product made by fermenting cream with specific bacterial cultures, resulting in a rich, creamy texture and a tangy flavor. Its smooth, velvety feel and distinctive acidity make it a versatile ingredient in both savory and sweet dishes across various cuisines. Widely used in Eastern European, Mexican, and American cooking, sour cream often accompanies baked potatoes, dips, and sauces, adding a cool, tangy balance. Historically, it has been valued for its preservative qualities and as a staple in traditional recipes, reflecting its cultural significance in regions where dairy fermentation has long been practiced.