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These easy lemon bars perfectly balance tart and sweet, making them a hit with everyone!
Preheat oven: to 350° F. Line a 13x9-inch baking dish with parchment paper for easy removal.
Make the Crust: In a stand mixer with the paddle attachment, mix 1 cup of melted butter, 1/2 cup of sugar, 1 and 1/2 teaspoons of vanilla, and 1/2 teaspoon of salt. Add 2 cups of flour and stir until a crumbly dough forms. Press dough firmly into the pan. Bake for 18-20 minutes or until lightly golden. Remove from oven and set aside.
Prepare the filling: In a large bowl, whisk seven eggs and 3 cups of sugar until blended. Add 1 cup of fresh lemon juice(you will need 4-8 lemons depending on how big they are) and 2 tablespoons of lemon zest until blended. Add 1/2 cup of flour and whisk until smooth and very well blended without overmixing.
Bake the bars: Pour filling over warm crust. Bake for 20-25 minutes, turning the pan halfway until set and no longer jiggly in the center. Be careful not to overbake. Cool at room temperature for 1-2 hours, then refrigerate for 1-2 hours.
Finish and Serve: Lift the parchment paper out of the pan and cut it into 18-20 squares. Clean and rewet the knife after each cut. Dust tops with powdered sugar.
Leftover lemon bars can be stored in an airtight container in the refrigerator for up to 5 days. You can also freeze them for up to 3 months—just thaw them in the fridge before serving.