6 cups skim milk
1/2 cup powdered milk
6 oz plain greek yogurt (Yoplait)
Warm milk in microwave to 175 F. 2 min each time with about 1 min to 30 second break and stirred in between each cycle. Once the milk is warmed, stir in the powdered milk. Cool milk to 105 F (I put min in the fridge to speed up the process). Add 1 cup of the warm milk to yogurt and gently stir until combined. Add 1 more cup of warm milk to yogurt and gently stir until combined. Pour milk/ yogurt mixture into the rest of the milk. Pour into 3 pint and 1 half pint jars with lids (or whatever combination will fit in your crock pot). Put the jars in the crock pot, fill with warm water to the rim of the pint jar. Alternate crock pot between warm and off for 6-8 hours. I think I did warm for hour then off for hour cycles, but not really regularly just whenever I happened to walk through the kitchen and think about it.
Ideally, you want the water temperature to stay consistent between 100-110 F, so you can put your thermometer in the water and use it to help you know when to cycle the crock pot on and off.