Skillet Chocolate Pie
["1 1/2 c. sugar", "3 Tbsp. flour", "1 1/2 sticks butter", "3 Tbsp. cocoa", "5 egg yolks", "1 1/2 c. milk", "1 1/2 tsp. vanilla"]
["Put in iron skillet with small amount of milk to mix.", "Cook, adding rest of milk.", "Heat until thick.", "Remove from heat; add vanilla.", "Pour in baked pie shell."]
["sugar", "flour", "butter", "cocoa", "egg yolks", "milk", "vanilla"]