In a stand mixer on medium speed, mix butter, flour, confectioners' sugar, lemon zest, and salt until the dough begins to come together (approximately 3 minutes).
Turn off mixer and press dough into a 9x13 baking dish. Bake for 10 minutes and let cool for 10 minutes.
While the crust is cooling, in a large bowl, whisk together eggs, flour, lemon juice, lemon zest, and sugar. Pour mixture over crust and bake for 20 minutes or until the filling becomes firm.
Let cool and garnish with extra confectioners' sugar. Enjoy!
Recipe by Chef Times Two at https://www.cheftimestwo.com/tangy-lemon-bars/