Chocolate Pie - cooking recipe

Ingredients

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

Preparation

Cook cocoa, flour, sugar, milk and egg yolks in double boiler until very thick, then add butter and vanilla.
Pour into baked pie shell.
Use egg whites or Cool Whip for topping.