1 package white cake mix
1 package (small) pistachio instant pudding
1 cup oil
1 cup club soda or gingerale
3 eggs
1/2 cup chopped walnuts
pineapple, raisins, cherries, or pecans opitional

Mix 4 minutes with electric mixer at medium speed.  Pour into greased bundt pan.  Bake 40 minutes at 350.

  Frosting

1 package pistachio instant pudding
1 1/4 cups cold milk
Whip until thick.  Add 2 cups cool whip and nuts.  Keep refrigerated.