sour cream or 32 oz plain yogurt

Sour cream is a fermented dairy product produced by adding lactic acid bacterial cultures to regular cream, resulting in a thick, tangy condiment with a characteristic acidic flavor. The fermentation process converts lactose into lactic acid, which coagulates the milk proteins and gives sour cream its distinctive texture and sour taste. Commercial sour cream typically contains 18-20% milkfat and may include stabilizers or thickening agents. It differs from crème fraîche, which is made from cream with a lower fermentation rate and milder tang, and from plain yogurt, which is made from milk rather than cream and has a different protein structure.

The ingredient originated in Eastern Europe and Russia, where cool climates and dairy traditions made fermented cream products common. Today, sour cream is produced worldwide using standardized culturing methods, making it consistent and shelf-stable when refrigerated.

Sour cream is used as both a cooking ingredient and a condiment across numerous cuisines. In Eastern European, Russian, and Central Asian cooking, it appears in borscht, stroganoff, and pierogi fillings. In Mexican cuisine, it garnishes enchiladas, tacos, and baked potatoes. Bakers use sour cream in cakes, quick breads, and muffins, where its acidity reacts with baking soda to create lift and moisture. As a condiment, it tops baked potatoes, chili, and soups. Its tangy richness complements savory and slightly sweet preparations, though it should be tempered gently into hot dishes to prevent curdling.