Most sour cream you can buy in the supermarkets these days are thickened artificially and have a mild, pleasant flavour. That’s all well and good, but I didn’t drag you here to waste time making your own sour cream when you can pick it up for less than $2 ready-made.
Like many homemade things, the satisfaction and added flavour of this sour cream is distinct from the stuff out of cartons, and as a bonus makes a great mini science experiment and provides some dinnertime conversation/dinner-party bragging rights.