This freeze-dried starter culture is of excellent and consistent quality and with care should provide delicious yogurt time after time. It is not a monoculture, but a carefully balanced blend of lactobacillus bulgaricus and streptococcus thermophilus, which has been developed to ensure optimum results. The starter culture is used to make a yoghurt start solution, which can be refrigerated and then used 2-3 tablespoons at a time to make batches of yoghurt.