Speaking of "Brownies 4...last call!"

Note how for stacking, I use parchment paper in between the layers of brownies, so they don't stick to each other (learned the hard way).

Take advantage of your parchment paper, especially the unbleached version! Use it to line your cookie sheets and brownie pans, and for cake-pan fit, trace the bottom of the pan atop the parchment paper, and then cut out on the line. Grease pan with butter first, place parchment on bottom (pen or pencil side down), and grease a bit more over the parchment. Works perfectly, and smells amazing (like butter) when you take out the cake.