- 1 cup heavy cream
- 1 Tablespoon buttermilk
Combine the cream and buttermilk in a saucepan over medium heat.
Heat just until the chill is off-to about 90 degrees.
Pour into a glass jar, cover lightly with waxed paper, and let set in a warm place for 12 to 20 hours, until thickened.
Replace the wax paper with plastic wrap or a tight lid and refrigerate for at least 6 hours. (It will keep 2 weeks in the refrigerator).
You can whip this substance to make it thicker, or add a little sugar if you like your cream sweet.