Mix the following:
20 cups of water
5 cups powdered milk (must be 100% milk product like the kind you get at the cannery.)
2-3 cups sugar
Mix in big pan on stove and heat to 180 degrees (we had to go out and buy a candy thermometer for this). Stir continually. (On our stove it took about 20 minutes to get to 180 degrees.)
Then turn off heat and cool to 115 degrees. This took over an hour for it to cool down to 115, stirring every once in awhile. (I found that you can speed up the cooling down process by putting the whole pan into a bigger pan or bowl of ice water).
1 cup of Dannon plain yogurt (for the “start”) and
2 tsp. Vanilla
Pour into 6 different quart jars and 1 pint jar. Place jars in Styrofoam cooler (we didn’t have one so I just used a regular cooler) and put in fleece blankets. We only had two little fleece blankets so I used other blankets to stuff around the sides, bottom, top etc. and it still turned out fine). Leave in cooler with lid on for 7-9 hours. Then refrigerate and serve when cold. You can pour out the little bit of excess liquid.
When your yogurt is finished save one cup of it to use as the “start” for the next batch. (You can continue to do that for about six batches and then it starts to weaken and so you start over with a new start from another Dannon plain yogurt again.)
We tried some different flavorings (bought from a kitchen store used to make candy) but the plain vanilla is great too and yummy with added fruit. We also added some food coloring to some of them just for fun.
It is also yummy frozen! We have made this several times now and love it!