Chocolate Pie
["1 c. sugar", "2 Tbsp. cocoa", "2 Tbsp. flour", "1 c. milk", "1/2 tsp. vanilla", "2 Tbsp. butter", "2 egg yolks (beaten)", "1 pie shell"]
["Mix sugar, flour and cocoa in heavy saucepan, add milk and cook slowly, stirring constantly.", "When mixture is hot, add egg yolks and continue cooking until thick; add butter and vanilla. Pour in baked pie shell and cover with meringue, bake at 350\u00b0 until brown."]
["sugar", "cocoa", "flour", "milk", "vanilla", "butter", "egg yolks", "pie shell"]