I'd have to agree with adding the chocolate chips. I am famous (in my own mind) for my home-made brownies and I will share a couple of secrets with you. First of all take some tin foil and mold it around the outside of the pan. Then place it in the pan, you then have a perfectly shaped liner. Then sprinkle a layer of small semi sweet chocolate chips on the bottom of the lined pan, then add the batter. Always under cook your brownies by a couple of minutes. Let them cool, then remove them with the tin foil. Carefully cut them then place them in the fridge for an hour or so to get them cold. Very chocolatey, under cooked and cooled and they are awesome, add a scoop of Hagan Daz rum and raisen ice cream and you have a dream dessert.
and yes I do have a subscription to Cook's Illustrated. In fact I have every issue sine they started in 1993.
Mike Plumb, TriPower MultiSports
Professional Running, Cycling and Multisport Coaching, F.I.S.T. Certified
http://www.tripower.org