Pistachio Cake
["1 white cake mix", "1 c. oil", "1 (3 oz.) pkg. pistachio instant pudding", "1/2 c. chopped nuts (optional)", "8 oz. Cool Whip", "3 eggs", "1 (12 oz.) bottle 7-Up"]
["Mix cake mix, eggs, oil and 7-Up for 4 minutes.", "Fold in nuts. Bake at 350\u00b0 for 35 minutes in a greased 9 x 13-inch pan."]
["white cake", "oil", "pistachio instant pudding", "nuts", "eggs"]