Blackberry Custard Pie
["1 1/2 c. blackberries", "1 c. sugar", "2 tsp. margarine", "1/2 c. milk", "3 tsp. flour", "1 pie shell", "1 1/2 c. Cool Whip"]
["Cook blackberries; add sugar and stir.", "Add margarine and stir.", "Mix 1/2 cup milk and flour, stirring until the mixture is not lumpy.", "Combine blackberries and flour mixture and cook until done.", "Pour mixture into pie shell.", "Let cool, then top with 1 1/2 cups Cool Whip."]
["blackberries", "sugar", "margarine", "milk", "flour", "pie shell"]