Once crust is done baking and is removed from oven, LOWER THE OVEN TEMP. to 300 degrees. Pour the lemon filling over the baked crust; continue baking for 25-30 minutes, or until center is set, and is no longer "jiggly" (mine took 28 minutes).
Remove pan to wire rack. Let cool to room temp, then place entire pan into refrigerator. Let bars refrigerate for 3-4 hours (the longer the better!) before you serve them. After the bars have chilled, lift the entire batch out of the pan at one time, by lifting them out via the aluminum foil that is hanging over the edges.
Cut the bars into sixteen 2" squares, then sift powdered sugar over the tops. Serve and enjoy. Keep remaining bars stored in refrigerator.
Lemon Bars https://www.thegratefulgirlcooks.com/lemon-bars/