Mama'S Chocolate Pie
["1 c. sugar", "3 Tbsp. cocoa", "3 Tbsp. flour (heaping)", "a pinch of salt", "2 egg yolks", "2 c. milk", "1 Tbsp. margarine", "1 tsp. vanilla", "1 (9-inch) pie shell, baked", "2 egg whites"]
["Mix dry ingredients.", "Stir in egg yolks.", "Add milk.", "Cook until thick, stirring frequently.", "Add margarine and vanilla. Pour in shell.", "Top with meringue made from egg whites.", "Brown in oven."]
["sugar", "cocoa", "flour", "salt", "egg yolks", "milk", "margarine", "vanilla", "pie shell", "egg whites"]