Old Fashioned Chocolate Pie
["1 c. sugar", "4 Tbsp. cornstarch or flour", "4 Tbsp. cocoa", "2 c. milk", "3 egg yolks, beaten", "1 Tbsp. butter", "dash of salt", "1 Tbsp. vanilla", "1 baked pastry shell", "2 egg whites, beaten stiff"]
["Cook first 5 ingredients, stirring constantly until thick. Add butter, salt and vanilla; stir well. Pour into pastry shell. Top with meringue and bake until golden brown."]
["sugar", "cornstarch", "cocoa", "milk", "egg yolks", "butter", "salt", "vanilla", "pastry shell", "egg whites"]