Directions:

1. Place 4 cups of the milk in a large pot and heat until boiling. Remove the milk from the heat and pour into a glass bowl.
2. Allow the milk to cool until just warm to the touch about 100-105° (A thermometer can be used to find the correct temperature.)
3. Mix the remaining milk with the yogurt in a small bowl then add it to the warm milk.
4. Cover the milk with a clean dishtowel and place in a dry warm location such as the oven for 8 to 10 hours or until the milk has thickened enough to pull away from the sides of the bowl. Note: Do not refrigerate
5. Place a single layer of cheesecloth over a large strainer that fits into a large bowl without touching the bottom and pour the thickened milk mixture into the cheesecloth. Cover and place in the refrigerator for 4 hours.
6. Discard the liquid that has drained from the yogurt and scoop the yogurt into an airtight container. Serve within 5 days.