THE BASIC PRINCIPLES OF POLKADOT MUSHROOM BAR

This recipe requires lining the nine x thirteen pan with foil and says you'll be able to elevate the bar cookies out in the pan when they are baked?  Why would anybody want To do that??? Can’t I use Slice the cookies into bars appropriate in the pan?  Yep, you confident can….I’ve completed four visits and learnd to take in the complete bar