yogurt

Yogurt is a fermented dairy product created by the bacterial fermentation of milk, primarily using Lactobacillus bulgaricus and Streptococcus thermophilus cultures. Originating in Central Asia thousands of years ago, yogurt has become a staple across the Mediterranean, Middle East, and South Asia. The fermentation process converts lactose into lactic acid, resulting in a tangy flavor and characteristic thick, creamy texture. Yogurt varies considerably in fat content (from non-fat to full-fat), consistency (liquid to thick), and tartness depending on fermentation duration and milk source. Common varieties include Greek yogurt (strained for higher protein), Icelandic skyr, Turkish yogurt, and lassi-style yogurts found throughout South Asia.

The finished product contains live bacterial cultures (probiotics) unless heat-treated, and can range in flavor from mildly tangy to intensely sour. Texture varies from pourable to spoonable, and color from pure white to naturally yellow-tinged depending on milk source and additives.

Yogurt functions as both a cooking ingredient and standalone food across diverse cuisines. In Middle Eastern and South Asian cooking, it serves as a marinade base for meats, a sauce foundation (such as tzatziki or raita), and a key component in curries and dips. Greek and Mediterranean cuisines incorporate it into savory dishes, desserts, and breakfast preparations. Yogurt acts as a tenderizer in marinades due to lactic acid content, adds moisture and tang to baked goods, and provides richness without fat in contemporary cooking. Beyond savory applications, it forms the base for frozen yogurt, smoothies, and desserts. Indian cuisine uses it extensively in raitas and marinades, while Middle Eastern cooking employs it in both warm sauces and cold condiments.