Recipe(tried): Watergate Cake and Fluffy Pistachio Frosting (using cake mix and pudding mix)

Here's an old family favorite.

WATERGATE CAKE AND FROSTING

1 small pkg.pistachio instant pudding
1 two layer size pkg. white or yellow cake mix without pudding
4 eggs
1 cup club soda or water
1/4 cup oil
1/2 cup chopped nuts

Combine all ingredients in large mixer bowl. Blend, then beat at medium speed of electric mixer for 4 minutes. Pour into 13x9" pan greased and floured or sprayed with Pam. Bake at 350* for 40-45 mins. or until tester comes out clean and cake begins to pull away from sides of pan. (Do not underbake)
Cool in pan 15 mins. Remove from pan and finish cooling on rack, top with:

FLUFFY PISTACHIO FROSTING

Pour 1 1/2 cups cold milk into deep narrow bottom mixer bowl.Add 1 envelope Dream Whip and 1 small pkg.pistachio instant pudding. Beat at low speed to blend. Increase speed to high and whip till soft peaks form, 4-6 mins. Makes about 3 cups.