Chocolate Potato Cake
["2 c. sugar", "1/2 c. butter", "1/2 c. shortening", "3 eggs", "1 3/4 c. flour", "1 c. boiled potatoes, run through a sieve", "1/2 c. cocoa", "2 1/2 tsp. baking powder", "1/2 tsp. each: nutmeg, cinnamon, allspice and salt", "1 c. nuts"]
["Cream sugar, butter and shortening.", "Beat in eggs.", "Add potatoes.", "Beat good.", "Add dry ingredients and nuts.", "Pour in a greased tube cake pan.", "Bake at 325\u00b0 for 1 hour."]
["sugar", "butter", "shortening", "eggs", "flour", "potatoes", "cocoa", "baking powder", "nutmeg", "nuts"]