recipe: homemade yogurt by re-culturing

 It really is this EASY to make yogurt!

1. Add 1 cup powdered whole milk and 3 1/2 cups water to a pan (or just use 3 1/2 cups already liquid milk).

2. Increase temp to 180-195 degrees F on medium low. Keep it here for 10-20 min checking periodically with a thermometer.

3. Remove from heat and let cool to 110-115 degrees F.

4. To the 110-115 F milk, add a few spoonfuls from a store bought container of plain yogurt (or form your prior batch of yogurt) and whisk or stir. It's okay if there are some clumps.

5. Pour into 2 pint jars and place in oven with the light on for 6+ hours.

Master Your Temperatures

Do your own research to ensure you are hitting the correct temperatures but these are the reliable basics I use to make fresh yogurt every 7-10 days. 

The best part? My cultures have been going active and strong now for almost a year now! In fact, the culture seems to be getting stronger over time. It now takes only four hours for my yogurt to fully solidify, compared to the six hours it took when I first started. Some yogurt makers on Reddit state that their culture gets weaker over time, but I have not found that to be the case at all.

Accurate Temperature Control

Maintaining the correct temperatures is the absolute key factor in making yogurt successfully:

- The heat stage (180-195 degrees F) - Heating your milk to this range kills competing bacteria so your yogurt culture can thrive. It also unravels the whey proteins so they can bond with the milk's casein, giving you a thick, smooth texture.

- The cool stage (110-115 degrees F) - You must ensure you do not add your starter culture to the milk until it has cooled below 115 degrees. Anything hotter will kill the beneficial bacteria. However, also ensure you do not let it cool below 110 before adding the yogurt and getting it into the warm oven as it needs to stay warm in order to turn into yogurt.

Customizing Your Texture and Batch Size

If you want prefer greek yogurt, you can easily strain the final product through cheesecloth to remove the liquid whey. However, I find this standard recipe is already perfectly thick, creamy and satisfying without any extra work.

This recipe yields two pint jars, which is the perfect amount for me as one person. It provides just enough to enjoy throughout the week without forcing you to eat yogurt every single day to finish it.

Keeping Your Culture Alive

Feel free to adjust the amount of milk to scale the batch size to your personal needs. Just remember the holden rule of sustainability: make your next batch within 7-10 days. This timeline allows you to use a small scoop of your current batch to safely innoculate the next one. Waiting longer than 10 days risks spoiling your yogurt and permanently weakening your live culture.