1 box white cake mix
1 c. Wesson oil
3 eggs
1 c. club soda
1 box instant pistachio pudding (3 oz.)
1/2 c. chopped pecans

Beat 4 minutes. Bake in 9 x 13 pan or 3 layer pans at 325 degrees for 30 to 45 minutes.

ICING:

1 c. sweet milk
1 box instant pistachio pudding (3 oz.)
1 c. sour cream
1/3 c. nuts (optional)
1 lg. container Cool Whip

Beat lightly everything except pudding and nuts for a few minutes. Put pudding in and stir until frosting stands in peaks. Add nuts and refrigerate in bowl for approximately 30 minutes. Frost cake.