Soupy Yogurt Rescue

One more thought: How hot did you heat the milk to, prior to adding the yogurt culture? Many recipes recommend heating the milk to ~170-180F, to kill off any bacteria that might otherwise compete and edge out the yogurt culture. This recommendation was more meaningful in the past, when pasturization was iffy, but it can still be beneficial these days: If you heat the milk to these temperatures every time, the culture can go on indefinitely (mine is nearly 3 years old).

Also, I've never managed to get yogurt going with Fage - it seems to have a much less active culture than other brands. I've had lots of success with plain Dannon and Stonybrook Farms.

Thank you all -- I tossed it. The starter was powdered yogurt starter, but as mentioned, it's been temperamental.

THird KTR's comment, toss that lot out, Try using Kefir as a starter, I've found it to be a reliable starter across various brands (lifeway, WEgmans, Trader Joes), whisk in the kefir into a bit of the heated and cooled milk before adding that batch to the remaining milk (like you temper for making a custard). I find that it helps set the yogurt better.

Hi Melusine! I have to second ktr here—it's sounds like your culture is spent and this batch may need to be tossed. I've had good luck just using regular store-bought yogurt (I use Fage) as a culture when my yogurt (which I otherwise just reculture) starts to get a little weird in consistency. Keeping my fingers crossed for you!

I would toss it and start over. It may be contaminated and you don't want to risk contaminating your new starter. Also, make sure your starter is meant to be recultured. I've seen some that are only meant to be recultured once or twice rather than indefinitely. You could always use some store bought plain yogurt as your starter as well. Good luck!