• Wash the jars or a bowl (that fits either your Instant Pot or Crockpot) and set them aside to dry. Open the envelope of yogurt cultures and empty into a small bowl. Rehydrate by adding a few tablespoons of slightly warm (tepid) water. Stir and set aside. If using yogurt for your starter, use 3 tablespoons and put in a small bowl. Set aside for after your milk is heated and cooled.
  1 envelope yogurt cultures
• In a stainless steel pot, bring the milk to 110 degrees if the milk carton says "Ultra Pasteurized". If the carton does not say this, bring the temperature to 160 degrees F. Stir frequently to disperse heat and not scald. As soon as your milk reaches it's temperature, remove from heat to cool. Continue to stir so that the milk cools faster.
  64 oz whole lactose free milk (1 half gallon)
• Once the milk cools down to 110 degrees F, remove about 3 tablespoons of the milk and add to the small bowl of re-hydrated yogurt cultures or the yogurt you used for starter. Stir well, and transfer to the pot of cooled milk. Use the whisk to blend it in well.
• Ladle or pour the cooled, yogurt culture inoculated milk into the prepared jars or the bowl.

Instant Pot Method

• Place a rack in the Instant Pot. Because only 5 to 6 jars will fit, use a bowl that fits inside your Instant Pot to pour the milk into. Place the bowl in the Instant Pot. Secure the lid. Use the 'Yogurt' program to culture your yogurt. You can also use the 'Warm' setting, but you may have to turn it back on if it shuts off automatically, or program in 8 hours.

Crockpot Method

• For Crockpot: Place a rack in the Crockpot. Put lids on the jars loosely and place one layer of jars in the Crockpot. Or pour into a bowl, cover with plastic wrap, and incubate the bowl of milk in the Crockpot. Secure the lid on the Crockpot loosely so it does not get too warm. Place the setting on 'Warm' and leave for 8 to 12 hours.

Oven 'Proof' Method

• For Ovens: If you have a newer oven, it may have a 'Proof' setting. Place lids on the yogurt. Place the jars in a 9x13 type of baking pan. Set in the middle of the oven. Set your oven to 'Proof' and leave for 10 to 12 hours.

Electric Yogurt Maker Method

• Electric Yogurt Maker:If you don't want to use an Instant Pot, Crockpot, and don't have an oven with 'Proof' settings, an electric yogurt maker will give you perfect results. Pour the milk in the jars and follow the appliance directions.
• After the 8 to 12 hour incubation time, remove the yogurt from the appliance you used to culture the yogurt. Set in the refrigerator for 4 hours before serving.
• Be sure to save ¼ cup of the new yogurt for your next batch!