I make our yogurt by the gallon, 4 qt jars at a time. (We have our own cow). After inoculating the milk with the yogurt starter, I just wrap each qt in a dish towel, and place them together in a cooler that just holds 5 quart jars. Cover with another dish towel, close the cooler lid, and in 6-8 hrs I have yogurt. Cost: $0, no electricity involved, using an old cooler that we already had. Just my little "green" contribution.

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