In my never ending (and often disgustingly disastrous) effort to rid our lives of the barely-qualifies-as-food that is available in most grocery stores, I have attempted sour cream. Not once, but twice....
Attempt 1) make kefir, pour said kefir into strainer lined with cheese cloth, allow to drain...walla! Thick kefir! NOT sour cream, not even close!
Attempt 2) carefully skim cream off goats milk until two cups are collected (that took forever! ) stir in 4 spoonfuls of store bought sour cream, allow to sit out over night, then refrigerate. Taste of butter mixed with sour cream.....just not quite right.... Pigs enjoyed it...
Wife suggests I look at the store bought sour cream, and see what it's made of. I laugh, silly woman. It's sour CREAM. Pull container out of fridge, read label..

not a speck of CREAM in store bought sour CREAM. UGH not only did I have to admit she was right, but I just fed the pigs two weeks worth of skimming cream from the 1/2 gallon of goats milk we get per day....
So, store bought sour cream has milk, whey, and a multitude of un-pronounceable ingredients.
Is there any hope? Can this be done at home?