Preheat your oven to 350°F (175°C) and prepare a 9x13-inch baking pan lined with parchment paper.

In a large mixing bowl, combine all-purpose flour, brown sugar, granulated sugar, and salt. Add the cold butter and mix until it resembles coarse crumbs.

Press the crust mixture into the bottom of the lined baking pan evenly. Bake for 15-18 minutes until lightly golden.

Whisk together the light brown sugar, corn syrup, eggs, and vanilla extract in a bowl until smooth.

Stir in a bit more flour and salt, then fold in the chopped pecans.

Pour the pecan filling over the crust and spread evenly. Bake for an additional 25 minutes until set.

Allow the bars to cool completely in the pan before lifting out and cutting into squares.