Mashed Potato Doughnut
["1 c. sugar", "2 eggs", "4 c. flour", "3 tsp. baking powder", "1/2 c. mashed potatoes", "1/2 to 3/4 c. milk", "2 Tbsp. shortening", "salt", "2 tsp. vanilla"]
["Beat eggs, then add sugar and mix well.", "Add potatoes, baking powder, salt, shortening and vanilla; mix well.", "Alternate milk and sifted flour.", "Mix with fingertips on floured board and roll to 1/4-inch thick; cut and fry."]
["sugar", "eggs", "flour", "baking powder", "potatoes", "milk", "shortening", "salt", "vanilla"]