Chocolate Pie
["1 c. sugar", "2 heaping Tbsp. flour", "3 Tbsp. cocoa", "2 c. milk", "3 beaten egg yolks", "3 Tbsp. butter", "9-inch baked pie shell"]
["Mix first 3 ingredients; then add milk.", "Cook until thickened. Add small amount of hot mixture to beaten egg yolks.", "Then add egg mixture to hot mixture.", "Cook 2 to 3 minutes longer.", "Take off stove, then add butter until melted.", "Pour in pie shell."]
["sugar", "flour", "cocoa", "milk", "egg yolks", "butter", "shell"]