Preheat oven to 350°F.
Line a 9x13 pan with parchment paper.
For the crust, mix the butter, sugar, and vanilla together in a medium bowl.
Add the flour and stir to combine.
Press firmly into your prepared pan and bake for 15 to 20 minutes or until the edges are light brown.
Add the sugar and flour into a large bowl. Use a whisk to get out any lumps.
Add the eggs, lemon zest, and lemon juice and whisk until combined.
Pour the filling over the warm crust. Bake for 30 to 35 minutes until the center is set and doesn’t jiggle.
Remove from oven and cool completely at room temperature. Then refrigerate.
Dust with powdered sugar before serving.
