Sugar-Free Doughnuts
["1/2 c. shortening", "1/2 c. margarine", "1 1/2 c. mashed potatoes", "1 1/2 c. potato water", "1 c. artificial sweetener", "2 eggs, beaten", "1 pkg. yeast", "10 c. unbleached flour", "oil for deep frying"]
["Cream shortening and margarine in bowl.", "Add mashed potatoes, potato water, sweetener and egg; beat well.", "Sprinkle with yeast. Stir in gently.", "Let stand", "for 1 1/2 hours in warm place.", "Stir in flour gradually.", "Knead on floured surface until smooth.", "Let rise, covered, in warm place 5 to 6 hours or doubled in bulk. Roll out on floured surface 1/2-inch thick.", "Cut to desired size. Place on floured towel.", "Let rise in warm place 1 1/2 to 2 inches or until doubled in bulk.", "Deep fry in 375\u00b0", "oil until light brown.", "Drain on paper towels.", "Yields 50 doughnuts."]
["shortening", "margarine", "potatoes", "water", "eggs", "yeast", "flour", "oil"]