Adding lemon juice to cream does make sour cream.
Homemade sour cream is easy to make and requires only 2 ingredients.
The two ingredients to make homemade sour cream are heavy cream and some acid like either distilled white vinegar or lemon juice.
Freshly squeezed lemon juice is best for making homemade sour cream, but even bottled lemon juice can also be used to make homemade sour cream.
Store bought sour cream is made from cream which is fermented with some lactic acid bacteria.
The process then causes the cream to thicken up and develop a tangy and sour flavor.
And some commercially made sour creams may also contain some stabilizers like rennin or gelatin to extend the shelf life.
Sour cream is not basically yogurt although fermented dairy products.
Sour cream is made from the fermentation of cream by a specific sour cream culture.
And yogurt is made from the fermentation of milk by different lactic acid bacteria.
The difference in the base ingredients results in the sour cream having a higher fat content, richer and smoother texture and a different flavor profile when compared to yogurt.