From Epicurious – submitted by Lori, Yorkville CSACrème fraîche is a lot like sour cream, but better. You can buy it in cartons, but it’s pricey; it’s easy to make and I think the homemade version is better.
Let stand for 8-24 hours.Note: I know—leaving the cream outside the refrigerator for 8 to 24 hours sounds wrong. But it doesn’t go bad, it gets better.