Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/4  cup           Buttermilk -- sour cream
                        yogurt
     1/2  cup           Heavy cream

Preparation:

Must stand 6-8 hours, and then be chilled. 1. In a saucepan, heat buttermilk and cream to body temperature. 2. Pour into a container and partially cover. Allow to stand for 6 to 8 hours at room temperature, when it will become thickened and slightly acid in taste. 3. Stir, cover and refrigerate until well chilled.