For me, it needs sweetening, so I added honey and vanilla. You could puree canned or fresh fruit and make different flavors. You could also use agave nectar to sweeten this in a healthy way!
I plan to try this again with Vanilla Almond milk and Coconut Milk when this batch of yogurt is gone!
This is not my recipe. Here's where I got my recipe from! What a great site if you have food allergies in your household!
UPDATE: I tried this with Vanilla Soy Milk and vanilla soy yogurt as my starter and it turned out great!
Slow Cooker Yogurt
1//2 Gallon Milk (I used Vitamin D) - pasteurized is ok, but not Ultra-Pasteurized!
1/2 cup yogurt (I bought a single serve which is 6 oz. and just ate the remaining 2oz. - from now on you'll have your own starter!)
Pour the entire 1/2 Gallon of milk into your Slow Cooker.
Set on LOW and cook foe 2 1/2 hours.
Turn off your Slow Cooker and let it sit for 3 hours.
After the 3 hours, remove 2 cups of the warm milk.
Add 1/2 cup yogurt
Add this to your remaining milk in the Slow Cooker and stir.
Cover the Slow Cooker with a heavy towel and let it sit overnight.
The next morning, remove the towel and admire your home-made yogurt!!!!!