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Yogurt starter is a product that contains a large number of lactic acid bacteria, including the Bulgarian bacillus. You can't grow them at home, but you can buy them in supermarkets or pharmacies.

Step 1

Prepare the starter. Pour the milk into a saucepan and bring it to a boil. Cool to 42 degrees and remove the foam from the surface. Pour the starter into the milk and mix thoroughly to avoid lumps. Cover the saucepan with a lid and wrap it in a thick cloth. Leave it in a warm place for 13 hours. Then remove the cloth and put it in the refrigerator for 120 minutes.