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Homemade Yogurt
Cook Time
20 mins
 

It may look daunting to make your own yogurt, but it is relatively simple. In the beginning, you need to keep an eye on the temperature, but mostly you just have to wait and give the cultures time to ferment. Other than the yogurt culture, the most important ingredients are time and temperature. You need 8-10 hours to incubate the yogurt in a warm draft-free environment, and an additional 8 hours in the refrigerator to finish. Once these steps are complete, you can eat it right away or strain out some of the whey for Greek-style yogurt.

Because there are only two ingredients in yogurt, use the best quality milk and yogurt you can buy. For best results, the yogurt used as your culture must contain real live cultures and no fillers, gums, or artificial ingredients. I use Fage and Dannon yogurt whenever I start with a new yogurt culture.

Seek out organic milk that is not ultra-pasteurized as this process kills off important and healthy bacteria needed for making yogurt.

You can use your homemade yogurt as a culture for up to 3-4 generations. After that, start over with a new batch of yogurt bought at the grocery.

This recipe scales up to 1 gallon of milk with ¼ cup (65 ml) fresh yogurt culture.

Yield: Makes about 7 cups (1 L 750 ml) yogurt before straining out the whey. 

Serving size is a half a cup (125 ml)

Keyword: Yogurt
Author: Ginger
Ingredients
Equipment needed
  • Heavy bottom stock pot or Dutch oven with lid
  • Instant read thermometer
  • Small bowl for tempering the starter
  • Whisk
  • Stainless steel mixing spoon or rubber spatula
  • Large bowl partially filled with ice optional
  • A warm and dry place like an oven for incubating the yogurt
  • Triple layer cheesecloth or thin flour sack towel
  • Strainer
  • String
  • Storage container
Ingredients
  • ½ gallon of milk whole or 2%, preferably organic and not ultra-pasteurized
  • 2 TB yogurt with live active cultures like Dannon or Fage
Instructions
Prepping your utensils
  1. Make sure all your utensils, pots and bowls are clean. Clean them with hot water and soap and drip dry on a clean kitchen towel. I do not sterilize my utensils or pots when I make yogurt, but some people do. If you wish to sterilize your utensils and pot, run them through a complete cycle in your dishwasher. You can sterilize your instant-read thermometer by placing the probe in a mug of boiling water and drip dry on a clean kitchen towel.
Heat the milk
  1. Rub an ice cube over the bottom and partially up the sides of your stock pot. This helps the milk from sticking to the bottom of the pot. If you do not have ice cubes, run the bottom of the pot under cold water and empty any water that collects in the pot.
  2. Pour your milk in the stock pot and set the burner between medium / medium-high.

  3. Take your starter, 2 tablespoons of yogurt out of the refrigerator and add it to a small bowl like a cereal bowl. Set it aside so it will come to room temperature while you heat and later cool the milk.
  4. Slowly, heat the milk until it reaches 185°F / 85.5°C without stirring. Any temperature at or slightly above 180°F (82°C) but below 195°F (90.5°C). You do not want the milk to boil or be too hot and kill off the important yogurt-making bacteria.

  5. When you reach 185°F / 85.5°C, lower the heat and maintain that temperature for 5 minutes.
  6. It is hard to maintain a constant temperature, at least on my stove, just keep it in the 180°F - 186°F /82°C- 85.5°C range. If you go below 180°F (82°C) stop stirring and turn up the heat until you get back at that temperature.
Cool the milk
  1. Turn off the heat and remove the pot from the stove. Let the milk rest until it cools down to 115°F (46°C). I allow my milk to cool on the counter and stir it every now and then to help release the steam. I set the timer to keep track of the time and check the temperature frequently. This process can take around 35 minutes, give or take.

    A faster method of cooling the milk is to fill a large bowl partway with ice and cold water. The bowl needs to be large enough to accommodate your stock pot with ice water surrounding the bottom and partway up the sides of your pot. A sink will work as well. Stir the milk in a back and forth manner every now and then until it is cool. Remove the pot from the ice bath when it reaches around 118° – 120°F (48° - 49°C). Place on the counter and keep the instant-read thermometer in the milk so you do not cool the milk below 115°F (46°). If the milk does fall below 115°, place the pot back on the burner and heat it up 115°F (46°C).

Add the Yogurt Starter
  1. Add one ladleful of the 115°F (46° C) milk in the bowl with your starter yogurt. Whisk the yogurt mixture until well incorporated then pour the yogurt culture in the pot with the milk. Stir then cover. Place the inoculated milk inside a draft-free and warm space.

Incubate the yogurt culture
  1. Place your yogurt culture in a warm draft-free place. In my house, my oven is the best spot. Keep the oven warm by keeping the oven light on. I found it does not always work if I let the yogurt incubate on the counter. According to Cheryl Sternman Rule in her book Yogurt culture, the ideal temperature for incubating yogurt around 100°F (38°C).

  2. Allow the cultured milk to incubate for 6 – 10 hours. Sometimes, it takes longer, up to 12 hours, but the consistent incubation time is around 8-10 hours. The yogurt is done when it looks thick and solid with some liquid, the whey, sloshing about when you jiggle the pot. It will look like plain yogurt. 

Chill
  1. One final step before eating your yogurt is to chill it in the refrigerator for several hours. Tip the yogurt in a bowl and tightly cover with plastic wrap or a tight-fitting lid. Add the yogurt to the refrigerator and chill for 6-8 hours or overnight. This extra step develops more flavor and a creamier consistency.

  2. Voiá, you just made yogurt! 

  3. Before you use up your yogurt, measure out 2 tablespoons (30 ml) to ¼ cup (60 ml) of yogurt and place in a bowl with a tight fitting lid. Label and date the yogurt. You will use this yogurt for your next batch of yogurt. Store in the refrigerator for up to 7 days. Taste before using to make sure it is not starting to turn. You can get 3-4 generations of yogurt when using starter from homemade yogurt. After that, start fresh with a new batch of yogurt from the grocery store.

Greek Style Yogurt
  1. Normally, I strain my yogurt for about 2-3 hours to thicken it up and produce Greek Style yogurt.
  2. To strain the yogurt, line the bowl of a fine mesh strainer or colander with a moistened triple layer of cheesecloth or a damp tea towel. The length of the towel or cheesecloth should drape over the sides of the strainer. Place the strainer or colander over a large bowl to catch the whey.
  3. Scrape the yogurt into the lined strainer. Draw up the four corners of your cheesecloth or towel and bring them together. Tighten them close to the yogurt and tie with a string or twisty. Place the bowl with the colander in the refrigerator and drain the yogurt until it reaches the consistency you desire. The longer it strains the thicker it gets. I like the consistency after straining for 3 hours.

  4. When done, place the yogurt in a glass container with a tight-fitting lid and store in the refrigerator. The yogurt will keep for a week.
  5. If your yogurt is thicker than you like, add some of the whey back in to loosen it up.

  6. Reserve your whey and store in a covered container in the refrigerator for 2 weeks.
Recipe Notes

Yogurt dries out inconsistently throughout the incubating and straining process. This creates some lumpy spots in your yogurt. This is normal. If you want smooth yogurt, spoon out the amount you want then whisk it right before using. Whisking the yogurt will make the yogurt looser, but it gets out the lumps.

Whey

Don’t throw out the whey. It is great in many recipes and for marinades. Use whey in any recipe calling for traditional yogurt, not Greek yogurt, or milk like in baked goods, pancakes, and bread. Whey is acidic, so it will activate the baking soda. Use in smoothies. Use as a tenderizer for meats and in marinades. Whey will last in the refrigerator for up to 2 weeks.