Potato Doughnuts
["1 c. sugar", "2 Tbsp. melted shortening", "2 eggs", "1 c. mashed potatoes", "1 tsp. soda (in 1 c. buttermilk)", "1 tsp. soda (in flour)", "4 c. sifted flour", "2 tsp. cream of tartar", "1 tsp. salt", "1 tsp. nutmeg", "1/2 tsp. vanilla"]
["Combine sugar, shortening, eggs and potatoes.", "Add buttermilk in which soda has been dissolved.", "Add dry ingredients and vanilla.", "Let set in refrigerator for 1 hour.", "Roll on floured board to 1/2-inch thickness.", "Cut with donut cutter and fry in deep fat until brown."]
["sugar", "shortening", "eggs", "potatoes", "soda", "soda", "flour", "cream of tartar", "salt", "nutmeg", "vanilla"]