Plain Yogurt

Directions

1. 1
   Mix the yogurt with 1/2 cup of the milk in a large glass or earthen bowl.
2. 2
   Set aside.
3. 3
   In a small saucepan, bring the remaining 3 1/2 cups milk to a boil and allow to boil for 5 to 6 minutes (the milk will start to foam and rise up).
4. 4
   Take immediately off the heat and allow to cool for 15 to 20 minutes, until you are able to comfortably insert a finger into the hot milk (the temperature should not feel much different from your body temperature).
5. 5
   Pour the milk into the yogurt-milk mixture and blend well.
6. 6
   Cover the bowl tightly and wrap in blankets to keep warm (the more blankets, the better).
7. 7
   Let stand overnight or for 12 to 14 hours in a warm place (you want the active yogurt cultures to grow).
8. 8
   The next morning you will have yogurt.
9. 9
   Because you will not be adding thickeners such as cornstarch or gum stabilizers, the final product will be somewhat runnier than commercial brands.
10. 10
    But the resulting taste has a much more sour flavor, which is more traditional.
11. 11
    Keep refrigerated for up to 3 to 4 days.