I've had this recipe for about 30 years and I really can't remember where I got it from. Since I never owned a "yogurt maker", I always used this method. The recipe makes a surprisingly good "plain" yogurt. Cook/prep times do not include the 4 hour setting time or the 8 hour chilling time. **Note: After you make your first batch of homemade yogurt, you can use your homemade plain yogurt as the starter for future batches.