Pour milk into a 2-quart or larger pot.  Sprinkle with gelatin or dry milk powder and stir.  Attach kitchen thermometer to pot and heat milk on stove over medium heat until thermometer reads 180 degrees Fahrenheit, stirring frequently.  Remove from heat and allow milk to cool to 110-115 degrees Fahrenheit.  To speed up the cool down, place pot in an ice water bath, just be sure the ice water does not get into the milk!  In an ice water bath, this cool down usually takes 10-15 minutes.

Once the milk temperature is between 110-115 degrees Fahrenheit, add the store-bought yogurt and stir well.  Cover pot or with lid (or transfer to your container of choice) or plastic wrap and place in oven with just the oven light on for 10-12 hours or overnight.

Once the fermentation time is complete, place the yogurt in the fridge to chill (and store) and enjoy with your favorite toppings or in your favorite recipes!  Try our Cinnamon or Chocolate Chip Granola here!