Figure out a system whereby you can keep the fermenting milk warm (not hot!) for 6-8 hours. Make sure everything is clean: pot, yogurt-fermenting container(s), utensils. Stainless steel is great. I use a stainless steel tiffin set on a crock-pot base. A tiffin is a stack of matching metal containers that fit into one another, and the top container has a tight-fitting lid. My tiffin is made up of four matching 6 c containers. During the winter, I usually make yogurt in just one of the containers--the top one with the fitted lid. Below, I tell you how to make yogurt with a set-up like mine.
Pour 8 c milk (I like to use whole raw milk with or without the cream skimmed off) into a large stainless steel pot. Turn the heat on high, and bring the milk to a boil. Note the time that the milk reaches the boiling point, so you can make sure you boil the milk for 15-20 minutes. Turn down the flame a little so that the milk is still boiling pretty hard, but not hard enough to boil over the top of the pot and make a mess. Occasionally, scrape the bottom of the pan with a flat-edge metal spatula, and scrape the sides of the pot with a heat-resistant spoonula. After 15-20 minutes of boiling, turn off the heat and cool the milk. If you're in a hurry, cool it off in a tub of cold water. If you're not in a hurry, just let it sit covered with a clean cloth and allow it to cool off at its own pace. When the milk is still hot but just cool enough that you can keep your (clean!) finger in it for 25 seconds without getting burned, it's ready to ferment.
For a yogurt starter, use either homemade yogurt or store-bought whole milk plain yogurt. You can use the low-fat version, but it will probably come out stringy the first time. After the first time, you will have a good starter for your next batch and the yogurt won't come out stringy.
Put 1 1/2 t plain, live yogurt into the bottom of the tiffin container that's going to rest on top of the other two containers (i.e., the base that has the hot water in it, and the one above that which is empty--see next paragraph). Stir the 1 1/2 t yogurt a little.
Put the crock-pot base on the lowest setting and plug it in. Then fill the bottom container of the tiffin with about 1/2 inch of hot water, and cover it with the next container, to provide an empty air space to insulate the yogurt. The empty container provides air-space so that the hot water in the bottom container doesn't cause the fermenting milk in the top container to get too hot (see previous paragraph).
Next, pour a small amount of the prepared milk into the yogurt-starter and stir them together a bit. Then add the rest of the milk. Since my containers have a capacity of 6 cups, because I boil my 8 cups of milk down, it usually fits just right in my container. You'll have to adjust your starter amount in relation to the amount of milk you want to make into yogurt. For instance, if you are fermenting 4 c milk, you would use 1 t starter. Or for 2 c milk, use 1/2 t starter, etc. (Note: you don't have to boil your milk to condense it. If you like, you can just turn it off as soon as it comes to a boil. Cool it and ferment it as is).
Crock-pot base is set on lowest setting and middle container provides insulating air-space |
Gently stir the milk just a little and then place the lid on the container. Carefully lift it onto the empty container above the one with hot water in it, and then drape a wool blanket over the whole set-up. Leave it alone and avoid moving it for six to eight hours. Six hours is usually sufficient. If you accidentally forget to cool your yogurt at six hours, no problem. But after eight hours, it becomes too sour.
Drape a wool blanket over the whole set-up |
After six hours, unplug the crock-pot base, lift the yogurt off the tower, and put it into the fridge. Some people leave the lid off their yogurt for a while, just to let some of the whey evaporate while it's sitting in the fridge. I find that because I cook the milk down, it's quite dry enough to just go ahead and cover it right away.
Beautiful homemade yogurt |
There you have it, voila! Homemade yogurt!
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