1 white or yellow cake mix
3 eggs
1 c. club soda
1 c. oil
1/2 c. walnuts
1 pkg. instant pistachio pudding

Mix together. Grease cake pan, 13 x 9 inch. Bake at 350 degrees for 45 minutes.

FROSTING:

Whip together 1 package instant pistachio pudding and 1 cup milk. Fold in 1 Cool Whip. Frost!