So there was a girl in my ward that used to always make me these cookies. They were very good. Well, this girl got a boyfriend, and for some reason she decided she shouldn't make me the cookies anymore. So I made them myself.
1 cake mix (the white sparkly one is best - I forget what it is called)
1/3 cup oil
Oven at 350. I've made the cookies kinda smallish. Cook for 6 minutes, NO MORE. They'll appear really soft when you take them out, but after about a minute of cooling, you'll see they're perfect (or overdone).
Give it a try!