Sure, it's easy to stroll down the supermarket aisle and throw a cup of yogurt into your cart, but have you ever been tempted to make yogurt in your own kitchen, and get benefits in the area of digestion, improved immunity and lessened food allergies, by making natural yogurt with good bacteria probiotics?
Ingredients
• 1 quart (946 mL) milk (any kind but if you use "ultra-high pasteurized" or "UHP" or "UHT" then you can skip step one, as the milk has already been heated to this temperature before the pack was sealed)
• 1/4 to 1/2 cup non-fat dry milk (optional)
• 1 tablespoons white sugar to feed the bacteria
• pinch salt (optional)
• 2 tablespoons existing yogurt with live cultures (or you can use freeze-dried bacteria instead)
1. Heat the milk to 185ºF (85ºC).
Using two pots that fit inside one another, create a double boiler. This will prevent your milk from burning, and you should only have to stir it occasionally. If you cannot do this, and must heat the milk directly, be sure to monitor it constantly, stirring all the while. If you do not have a thermometer, 185ºF (85ºC) is the temperature at which milk starts to froth. It is highly recommended that you obtain a thermometer in the range of 100 - 212ºF, especially if you plan to make yogurt on an ongoing basis.
2. Cool the milk to 110ºF (43ºC). The best way to do this is with a cold water bath. This will quickly and evenly lower the temperature, and requires only occasional stirring. If cooling at room temperature, or in the refrigerator, you must stir it more frequently. Don't proceed until the milk is below 120ºF (49ºC), and don't allow it to go below 90ºF (32ºC); 110ºF (43ºC) is optimal.
3. Warm the starter. Let the starter yogurt sit at room temperature while you're waiting for the milk to cool. This will prevent it from being too cold when you add it in.
4. Add nonfat dry milk, if desired. Adding about 1/4 cup to 1/2 cup nonfat dry milk at this time will increase the nutritional content of the yogurt. The yogurt will also thicken more easily. This is especially helpful if you're using nonfat milk.
6. Put the mixture in containers. Pour the milk into a clean container or containers. Cover each one tightly with a lid or plastic wrap.
7. Allow the yogurt bacteria to incubate. Keep the yogurt warm and still to encourage bacterial growth, while keeping the temperature as close to 100ºF (38ºC) as possible. An oven with a pilot light left on is one option; see the "Tips" section for other ideas.
After seven hours, you'll have a custard-like texture, a cheesy odor, and possibly some greenish liquid on top. This is exactly what you want. The longer you let it sit beyond seven hours, the thicker and tangier it will become.
Many commercial yogurts include a thickening agent, such as pectin, starch, gum, or gelatin. Don't be surprised or concerned if your homemade yogurt has a somewhat thinner consistency without these thickeners.
9. Add optional flavorings. Experiment until you develop a flavor that your taste buds fancy. Canned pie filling, jams, maple syrup, and ice-cream fudges are good flavorings. For a healthier option, use fresh fruit, with or without a small amount of sugar or honey.
10. Use yogurt from this batch as the starter for the next batch.
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