I got promted on here by the crockpot method to make mine; I love it. I started researching it and the tartness of yogurt can be controlled so I can eat mine without any added sweetness even though I like to add fruit but normally doesn't have additional sugar. I have used 2% and whole milk, with powdered milk added to it. I heat it on the stove because I don't have the patience for the crockpot to heat up to 185 or higher, I add the powdered milk when its heating up so that it desolves better and when it cools back down to 110 I add the yogurt. The first time I just added a small container of plain greek yogurt, the second time I used some of what I made to make my next batch. I have to make more tonight. Since I don't heat mine in the crock pot I put a little water in the crockpot and turn it on high while I'm making the milk mixture and then turn it off. I put the yogurt mixture into two chinese soup containers, the large ones and then put the lid on pot and cover with a towel. 10 to 12 hours later I have thick greek type yogurt. I love the taste because it's good without any additives. I give it to my one little dog who gets yeast infections and even though she wouldn't eat store yogurt without having things added to it; she likes the whole thing. I've been making 1/2 gal at a time but that doesn't get me thru the week so this week I'm making a whole gallon, so that will be 4 large containers of yogurt for about $3 total, I can't beat that even at the commisary.