This Traditional Yogurt Starter is a pleasantly tangy direct-set yogurt starter that is easy to use. Make yogurt when you need to and freeze the remaining packets for later. Direct-set or single-use cultures are added to a batch of milk to produce a single batch of yogurt. With some care, a direct-set starter may be re-cultured two or three times by using some of the yogurt as a starter for a new batch. Eventually, however, a new powdered starter must be used. This is a good choice for beginners or those who do not want to maintain a culture every week. Includes four packets of traditional yogurt starter culture.