Chocolate Pie - cooking recipe

Ingredients

3 egg yolks
3/4 c. sugar
2 1/2 Tbsp. cocoa
2 Tbsp. butter
2 1/2 Tbsp. cornstarch
2/3 c. Pet milk
1 c. milk

Preparation

Mix one at a time, in order given.
Cook on medium heat.
Stir constantly until thickens.
Let cool.
Stir every 5 minutes.
Pour into cooked crust, or graham cracker crust.
Top with Cool Whip.