Position one strip of parchment paper from the front to the back, with the other from left to right. If done correctly, the two strips will form a cross-like shape.
Once the pan is covered, take your stick of butter, rub it on the parchment paper, pour in the brownie batter, and bake according to the recipe instructions.
Cut the brownies only when they've cooled down (about 30 minutes), and then grab the overlapping strips of parchment paper in each hand and lift the brownies out of the pan.
Use a serrated knife, which has blades with multiple saw teeth, making it ideal for cutting thick, crusty foods. Be sure to cut the brownies on the counter, not in the pan.