Chocolate Pie
["1 1/2 c. milk", "1 1/2 c. sugar", "3 eggs, separated", "3 Tbsp. cocoa", "3 Tbsp. flour", "1 stick butter", "1 tsp. vanilla"]
["Beat egg yolks well (save whites for top of pie).", "Add milk and stir well.", "Mix flour, cocoa and sugar all together.", "Add slowly with egg and milk.", "Put on top of the stove and cook on low heat until thickened, then add butter and vanilla.", "Pour in uncooked pie shell and cook at 350\u00b0 until thickened."]
["milk", "sugar", "eggs", "cocoa", "flour", "butter", "vanilla"]