Anyways if using parchment do grease the pan with butter then layer with parchment otherwise they won't stick on the pan properly to give perfect cookie bars.
Keep the greased/ layered pan aside.
Take care of the edges too, press them gently all over the sides.
Gently remove the baked bars from the pan by using the overhang foil and also place hand underneath while lifting up.
Transfer to cutting board and cut into 24 decent bars.