Preheat your oven to 350°F and line a 9x13-inch baking dish with parchment paper. Set it aside.

In a large mixing bowl, combine the butter and white sugar. Use a hand mixer to cream them together until smooth.

Stir in the flour and salt until fully incorporated.

Press the mixture evenly into the bottom of the prepared baking dish. Bake for 15-20 minutes, or until the edges start to turn lightly golden.

While the crust bakes, prepare the filling:

In a large bowl, beat the eggs and sugar with a hand mixer until well blended.

Add the lemon juice and vanilla, mixing until smooth. Gradually incorporate the flour until fully combined.

Pour the filling over the warm crust and return to the oven. Bake for 20-22 minutes, or until the filling is set.

Remove from the oven and let cool to room temperature, then refrigerate for at least 2 hours.

Once chilled, dust with powdered sugar then slice into squares before serving.