Chocolate Pie
["1 c. sugar", "1/3 c. cocoa", "3 egg yolks", "1 Tbsp. vanilla", "1/3 c. flour", "2 c. milk", "2 Tbsp. butter"]
["Sift together the dry ingredients. Add remaining ingredients. Bring to a boil, reduce heat and stir until thickens.", "Pour into baked pie shell.", "Serves 6."]
["sugar", "cocoa", "egg yolks", "vanilla", "flour", "milk", "butter"]