1. Mix sugar and cornstarch in saucepan. 2. Add 1 1/2 cups water. 3. Cook until clear; remove from heat. Add 1 package blackberry Jell-O. 4. Stir to dissolve. Cool slightly and add 1 pint or more of the blackberries. 5. Fold into Jell-O mixture carefully. 6. Pour into chilled crust. Store in refrigerator. 7. Keeps well. 8. Serve with whipped cream or ice cream. 9. Use 1 tablespoon less of Jell-O when using fresh berries.
