Indian dahi, also known as curd in the Indian context, is a traditional fermented dairy product similar to yogurt but distinct in its preparation and taste. It is made by introducing a bacterial culture to lukewarm milk, which then ferments the milk sugars (lactose) into lactic acid.
This process thickens the milk and gives it a tangy flavor. Dahi is an essential part of Indian cuisine and is consumed in various forms across the country. It can be eaten plain, used as a base for raitas (a yogurt-based condiment), blended into smoothies (lassi), used in marinations for meat and vegetables, or incorporated into desserts.