INGREDIENTS:

¾ cup sugar substitute
3 tbsp. cornstarch
1/8 tsp. salt
1 tbsp. butter flavored granules
2 cups fat-free milk
3 Tbsp. of Hershey's unsweetened cocoa
3 Tbsp. of shortening or oil
1½ tsp. vanilla extract
1 tbsp. margarine
1 pre-baked 9" pie crust

FILLING:

Mix together sugar substitute, cornstarch, salt and butter granules in a 2 quart microwave-safe glass bowl. Slowly add milk and stir so that mixture does not clump together. Microwave on high for 4 minutes.
Stir making sure that the clumps of cornstarch are smoothed out.
Microwave on high for 2 minutes.
Stir to smooth out cornstarch and add chocolate.
Microwave on high for 2 minutes.
Stir again and add margarine and vanilla.
Cover mixture with plastic wrap so that the wrap touches the surface of the filling. Let cool for 15 minutes.
Remove wrap and pour filling into pie shell. Cover with plastic wrap and refrigerate for 3 hours.