Dock the shortbread: Before baking the shortbread, dock the dough with the tines of a fork to encourage even & thorough baking.




Whisk the lemon filling vigorously: To ensure the eggs are fully incorporated into the filling, whisk the mixture vigorously. The last thing you want are cooked pieces of egg in your filling!




Chill the baked bars: For the filling to set up to a thick, sliceable consistency, the bars need to be chilled for at least one hour or overnight.




Decorate with powdered sugar just before serving: The powdered sugar will melt into the bars as they sit, so it's best to wait to decorate them until just before serving.