Yogurt is part of of the the dairy level of the food pyramid. Offering many digestive benefits, it comes in a variety of flavors and textures. So many, you could probably have a different one a day for a month. There's plain, custard style, fruit, fruit on the bottom, and many many flavors.
But what exactly is yogurt? Yogurt starts out as milk which is heated to about 200 degrees F for 10 to 30 minutes. Then it has to be cooled very rapidly to about 112 degrees F and mixed with the yogurt starter that contains the two necessary bacteria. For the custard style or thicker yogurt, the milk has to be heated for a longer period of time. After it has cooled, it's put into clean containers at 100 degrees F. This fermentation process is what develops the tartness in the yogurt.
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