Homemade Crème Fraîche

Description
French sour cream.
 * Contributed by Catsrecipes Y-Group
 * Source: my old recipes
 * Makes 2 cups

Ingredients

 * 1 pint heavy cream
 * 2 tbsp buttermilk

Directions

 * 1) Put cream in glass container or jar and add buttermilk.
 * 2) Stir lightly and cover.
 * 3) Allow jar to stand at room temperature until thickened to the consistency of sour cream.
 * 4) This can take anywhere from 12 to 24 hours, depending on the temperature of the room.
 * 5) The warmer the room, the faster it will turn to crème fraîche.
 * 6) Crème fraîche will continue to thicken as it chills.
 * 7) It will keep for about 10 days in the refrigerator.