1. Place the half gallon of milk into the Instant Pot and turn on the “keep warm” setting. 
2. Allow the milk to come to 185 degrees F. 
3. Once the milk has reached this temp, it will become frothy and bubbly on top. Remove from heat and let cool to 110 degrees. Stir often to help cool.
   
4. After the milk has reached 110, add in the sweetened condensed milk (1/2-1 can to taste) and the yogurt. Whisk to combine, put back into the pressure cooker, place the lid on, and seal. 
5. Cover completely with a large towel. (I know this looks silly.) 
6. Leave overnight; really, the longer you leave it the better. 
7. Once the yogurt is done, you can put in airtight containers and store in the fridge. Serve topped with your favorite fruit and granola! 

Enjoy!