8 oz sour cream

Sour cream is a fermented dairy product made from regular cream (the fat-rich layer skimmed from milk) that has been treated with lactic acid bacteria cultures, typically Lactococcus lactis. Originating in Eastern Europe and Russia, where it developed as a natural byproduct of cream fermentation in cooler climates, sour cream is now produced worldwide through controlled bacterial fermentation. The process acidifies the cream, lowering its pH to approximately 4.5 and causing the milk proteins to coagulate, resulting in a thick, tangy product with a characteristic sour flavor and creamy texture. Commercial sour cream typically contains 18-20% milkfat and may include stabilizers or thickening agents to maintain consistency.

Sour cream serves as both a cooking ingredient and a finishing condiment across numerous culinary traditions, particularly in Eastern European, Russian, Latin American, and North American cuisines. It is used as a topping for baked potatoes, soups (notably borscht), tacos, and enchiladas; incorporated into baking recipes for cakes, cookies, and quick breads where it adds moisture and tang; and blended into dressings, dips, and sauces to create creamy textures. In cooking, sour cream should be added near the end of heating to prevent curdling, though it can be tempered by mixing with a small amount of the hot liquid before incorporation. Its acidity and fat content make it valuable for both flavor enhancement and texture development in both sweet and savory applications.