Watergate Cake
["1 Duncan Hines white cake mix", "3 eggs", "1/2 c. chopped walnuts", "1 c. Wesson oil", "1 c. club soda", "1 box Royal instant pistachio pudding"]
["Put in mixer bowl all at one time and beat until smooth.", "Bake at 350\u00b0 for 40 minutes in 9 x 13-inch pan."]
["white cake", "eggs", "walnuts", "Wesson oil", "club soda"]