I did some experimentation to verify that it made a difference, and it does.
I know some of the shortbread cookies my mom used to make required refridgeration for an hour or they wouldn't turn out right. Unfortunately, I didn't get a chance to keep any of her old recipes.
I'm forgoing my purchase of that Kitchen Aid mixer for a while longer.
When you do get one, make sure it still has it's whisk and bread hook attachments.
What I need is a recommendation for the best peanut butter to use for a peanut butter cookie.
I seem to recall that some major brands add corn syrup now, which will change the consistency just slightly. So read the label and look at some of the off/store brands (more expensive does not always equal better). Using chunky vs. creamy will be up to you (I like the extra peanut chunks myself). Honestly the biggest catch with peanut butter cookies is not burning them- they can go from brown to too brown (to black) pretty quickly.