1 baked pie crust

Mix together and spread evenly in crust: 1/4 c. powdered sugar

FILLING:

3/4 c. sugar
1 1/2 tbsp. cornstarch
1 1/4 c. water
1 (3 oz.) pkg. blackberry Jello

Cook until mixture begins to thicken. Will not be thick; but the Jello will set when cool.

Cool filling. Add 1 pint chilled blackberries. Spread evenly in the crust. Top with Cool Whip just before serving.