Steps
- Preheat the oven to 325°F / 165°C. Line a 9 × 13in / 23 × 33cm glass baking dish with parchment paper.
- Mix 1 cup of melted unsalted butter, ½ cup of granulated sugar, 2 teaspoons of vanilla extract, and ½ teaspoon of salt. Stir in 2 cups plus 2 tablespoons of all-purpose flour until combined, then press evenly into the dish.
- Bake for 20-22 minutes, until the edges are lightly browned. Prick the warm crust all over with a fork, without going all the way through.
- While the crust bakes, sift 2 cups of granulated sugar with 6 tablespoons of all-purpose flour. Whisk in 6 large eggs and 1 cup of fresh lemon juice.
- Pour the filling over the warm crust. Bake for about 20 minutes, until the center is set and no longer jiggles.
- Cool at room temperature, then refrigerate until chilled. Cut into bars.