Chocolate Pie - cooking recipe

Ingredients

1/2 c. flour
2 Tbsp. cornstarch
1/2 tsp. salt
1 1/2 c. sugar
2 c. boiling water
3 egg yolks
1 Tbsp. butter
3 sq. chocolate
1 tsp. vanilla

Preparation

Sift flour, cornstarch, salt and sugar in top of double boiler; stir in 2 cups boiling water and place over other part of double boiler and boil until custard leaves the side of pan, then add egg yolks and cook 5 minutes.
Turn off heat and add vanilla and butter.
Pour in baked pie shell; cover with meringue and bake in moderate oven until brown.