If using a dark or nonstick pan, shorten the bake time by 3 minutes. If using an insulated pan, lengthen the bake time by 7 minutes.
Try one of Betty's newer brownie mix flavors, such as peanut butter, in this recipe. Just prepare the brownies as directed on the box. Trick-or-treaters will find big chunks of peanut butter-flavored chips in the brownies!