Slow Cooker Yogurt

Can you believe it? You can make yogurt in the slow cooker! If, like my husband, you're wondering why you'd want to, I can give you two good reasons. 1) It's really cheap. 2) You know exactly what's in it, and what's not (sugar, artificial coloring, and preservatives).

1 quart milk*
1/4 to 1/2 cup dry instant nonfat milk (optional, for thickening)
1/4 cup natural plain yogurt, preferably fresh (from store or homemade)

*If you use low-fat milk, you'll need to add the dry milk unless you like it runny. I added 1/2 cup, and it was nice and solid.

1. Put the milk and dry milk into a slow cooker and stir well. If the milk doesn't come at least halfway up the crock, you should put a smaller, oven-safe bowl (such as a Pyrex glass dish) inside the crock; this will add some time to the cooking.
   
2. Cook on high for 1.5 to 2 hours, until the milk is starting to bubble, but not quite boiling. (If you have a candy thermometer, you can test it; the milk should be 180 degrees to kill all undesirable bacteria.)
3. Remove the crock from the slow cooker and leave it on the counter, with the lid on, for about an hour. The milk should be cooled to about 110 degrees. If you don't have a thermometer, test with your finger; it should be a little warmer than a baby's bath water. (If you add the starter with the milk hotter than 110, it can kill the bacteria in the starter.)
   
4. Turn the oven on its lowest setting.
   
5. If the milk has formed a skin on top, run it through a sieve if desired.
   
6. Ladle a small amount of warm milk into a cup and mix the yogurt into it until well combined. Then pour the yogurt mixture into the milk and whisk well.
7. Turn off the oven, but leave the oven light on.
   
8. Put the lid on the slow cooker crock and put it in the oven to culture. Close the door and do not disturb for 5 to 12 hours. The longer you leave it, the tangier the taste.
9. Remove from the oven and refrigerate for several hours. Reserve 1/4 cup of yogurt for your next batch.
   

Serve with one or more of the following:

• Fruit of your choice (bananas and blueberries are nice)
• Strawberry jam (about a tablespoon per cup)
• Cereal or granola
• Vanilla and maple syrup to taste

When you add fruit, the yogurt may get runnier, so it's best to add it just before serving.

If you prefer Greek style yogurt (thicker), line a colander with a coffee filter or cheesecloth and allow it to drain overnight. You can use the drained whey to add protein to smoothies, or you can feed it to your dog.