MOCK SOUR CREAM Servings: 1/2 cup 1 T. kosher pareve margarine 1 T. cornstarch 1 c. non-dairy creamer 1 T. white vinegar Melt margarine over low heat. Remove and stir in cornstarch until smooth. Add about 2 T. creamer and beat with a spoon until smooth. Return to low heat and gradually add creamer. Continue cooking and stirring until mixture comes to a boil. Lower heat and continue stirring until mixture is the consistency of custard. Remove from heat, add vinegar, and mix well. Cool.