Mississippi Sweet Potato Cake
["1 box (18 1/2 oz.) spice cake mix", "1 box (3 3/4 oz.) instant vanilla pudding", "4 eggs", "1 c. water", "1/2 c. oil", "1 c. cooked, mashed sweet potatoes", "1/2 c. chopped pecans"]
["Grease and flour three 8-inch round cake pans.", "Mix all ingredients and beat well.", "Pour into pans and bake 25 to 30 minutes at 350\u00b0."]
["cake mix", "vanilla pudding", "eggs", "water", "oil", "potatoes", "pecans"]