2/3 cup water
1/3 cup cider vinegar or wine vinegar
1 tablespoon cornstarch
1 tablespoon flour
1 teaspoon dry mustard
1/4 teaspoon salt
1 pinch black pepper freshly ground
2 teaspoons margarine
8 teaspoons sugar
Beat or whisk together water, vinegar, cornstarch, flour, mustard, salt and pepper in a heavy saucepan. Cook over medium heat, stirring constantly about 6 minutes until smooth and thickened. Stir in margarine and sugar. Whisk until smooth. Pour into clean jars (eg. 1/2 cup canning jars) and mark with contents and date to use by. Store, covered, in the refrigerator up to 3 months.