Granny'S Chocolate Pie
["1 c. sugar", "2 Tbsp. cocoa", "3 Tbsp. cornstarch", "1 Tbsp. flour", "2 2/3 c. milk", "3 egg yolks", "dash of salt", "1/8 stick margarine", "1 tsp. vanilla", "1 (9-inch) pie shell", "4 Tbsp. sugar"]
["Mix all dry ingredients. Add milk slowly, mixing thoroughly. Bring to boil in double boiler. Add egg yolks and cook until very thick, stirring frequently. Remove from heat and add vanilla and margarine. Cover with meringue from egg whites, separated from above egg yolks, adding 4 tablespoons sugar to egg whites. Bake at 325\u00b0 for 20 minutes or until golden brown."]
["sugar", "cocoa", "cornstarch", "flour", "milk", "egg yolks", "salt", "margarine", "vanilla", "pie shell", "sugar"]