Preheat oven to 350 degrees
In mixer bowl - cream together butter & sugars.
Add egg & vanilla - beat 10 seconds to combine
Add in flour, pudding mix, baking soda & salt - beat well until fully combined
Beat in walnuts on low
Take tablespoon size pieces of dough & roll them between your hands to form a ball
Place on cookie sheet about 2 inches apart to allow for spread
Bake 10-12 minutes
Let cool on cookie sheet 10 minutes before transferring to wire rack to finish cooling
*remember to only place uncooked dough on a room temperature cookie sheet & not on one that is still hot out of the oven. This changes your cookie.