Daisy'S Sweet Potato Pie
["2 c. sweet potatoes, mashed", "1 c. sugar", "1/2 stick butter", "1 tsp. vanilla", "cinnamon to taste", "1 deep unbaked pie shell or 2 regular unbaked pie shells"]
["Preheat oven to 350\u00b0.", "Mix all ingredients.", "Pour into pie shell.", "Bake at 350\u00b0 until firm."]
["sweet potatoes", "sugar", "butter", "vanilla", "cinnamon", "shell"]