Sour cream is a thick, creamy dairy product made by fermenting cream with specific bacteria. This fermentation process gives sour cream its characteristic tangy flavor and slightly acidic taste. It is commonly used in cooking and as a topping for various dishes, such as baked potatoes, tacos, and soups. In addition to its culinary uses, sour cream is often incorporated into recipes for dips, dressings, and baked goods. It can also serve as a substitute for mayonnaise or yogurt in certain dishes, adding creaminess and a hint of acidity. Sour cream is available in various fat content levels, including full-fat and reduced-fat options.