because of the lactic acid bacteria put in it
The probiotic bacteria that is added to the yogurt and cheese gives it that sour taste.
its out of date
Lactic acid produced by fermentation.
Lactic acid produced by fermentation.
It could be the flavoring, how old the yogurt is. But it is not normally sour.
a more tart tasteImproved answer:Not really. It doesn't really make much of a difference; but I actually use plain yogurt instead of sour cream. Also, plain yogurt would be better for you, for your health. Taste-wise, though, I think there's hardly a difference, unless your very sensitive in that way.
Sour Yogurt
All Purpose cream won't give you the thickness or taste of sour cream. It wouldn't taste terrible though. Instead add a few tablespoons of plain yogurt, or a tsp of lemon juice or vinegar in with the regular cream the taste will be a bit more like stroganoff. It still won't be as thick as sour cream, you'll need to reduce it beforehand.
it taste sour a little sour
A bacteria called lactobacilus converts lactose into Lactic acid thus making it sour. Lactic acid buildup due to bacterial activity causes the pH of the milk to drop. Once the pH drops below pH 4.6, the casein proteins coagulate and forms a curd. The curdling is due to the milk becoming sour.
Soft rice with sweet yogurt is good, anthing soft and not sour in taste will work. This is what I eat when I have sore teeth.
Yogurt.