Chocolate Pie - cooking recipe

Ingredients

1 (9-inch) pie shell baked
1/2 c. cocoa, mixed with hot water to paste-like consistency
2 c. sugar
1/2 c. butter or margarine
1/2 c. flour
4 egg yolks
2 c. rich milk (Use one large can evaporated milk and finish filling 2 cups with whole milk)
1 tub Cool Whip

Preparation

In a sauce pan, mix all ingredients.
Cook over medium heat until very thick.
Pour into pie shell.
Let pie cool and top with Cool Whip or whipped egg whites.