Hershey's Cocoa Cream Pie

Yield:	1 Pie
Categories:	Pies, Desserts

1/2	c	Hershey's Cocoa
1 1/4	c	Sugar
1/3	c	Cornstarch
1/4	ts	Salt
3	c	Milk
3	tb	Butter or margarine
1 1/2	ts	Vanilla extract
1		Baked 9-inch pie crust OR- graham cracker crumb crust (cooled)
		Sweetened whipped cream