non-fat yogurt or sour cream

Non-fat yogurt is a fermented dairy product produced by culturing milk with lactic acid bacteria, specifically Lactobacillus bulgaricus and Streptococcus thermophilus, with all or nearly all milk fat removed during processing. The fermentation process converts milk lactose into lactic acid, resulting in a tangy flavor and thick, creamy texture characteristic of yogurt. Non-fat yogurt typically contains less than 0.5% milkfat by weight and relies on stabilizers and thickening agents (such as gelatin, pectin, or cornstarch) to achieve its distinctive consistency.

Non-fat sour cream is similarly a fermented dairy product made by culturing pasteurized milk or cream with lactic acid bacteria, but with virtually all fat removed. The fermentation produces lactic acid, which imparts the characteristic sour, acidic taste. Both products are shelf-stable when refrigerated and serve as lower-calorie alternatives to their full-fat counterparts while maintaining comparable tang and functional properties in cooking.

Non-fat yogurt and non-fat sour cream function as versatile ingredients in both sweet and savory applications. In cooking, they are used as bases for sauces, marinades, and dressings; as tenderizing agents in meat preparations; and as replacements for mayonnaise or full-fat sour cream in lighter recipes. In baking, they add moisture and structure to cakes, muffins, and quick breads while providing acidity that reacts with baking soda for lift. Culinarily, they appear in Middle Eastern tzatziki, Indian raita, Mexican crema-based dishes, and Scandinavian sauces. Both can be used as garnishes for soups, chili, and baked potatoes, though non-fat versions may separate or thin slightly when heated, requiring careful temperature management or the addition of cornstarch slurries to stabilize.