Mom'S Chocolate Pie
["1/3 c. flour", "1/2 c. sugar", "3 Tbsp. cocoa", "2 eggs, separated", "2 c. milk", "1 tsp. vanilla", "3 tsp. butter"]
["Mix flour, sugar, cocoa and milk.", "Cook until beginning to thicken.", "Add egg yolks and cook until done."]
["flour", "sugar", "cocoa", "eggs", "milk", "vanilla", "butter"]