Chocolate Pie - cooking recipe

Ingredients

2 c. milk
3/4 c. sugar
2 Tbsp. flour
2 Tbsp. cocoa
1/2 stick butter
3 egg yolks
1 tsp. vanilla

Preparation

In saucepan, mix sugar, flour and cocoa.
Add milk, vanilla and butter; boil until thick.
Pour in cooked pie crust.
Top with Cool Whip.