Heat oven to 350°F. Line a 9×13-inch pan with parchment and lightly grease.
Whisk the crust flour, sugar, and salt in a bowl. Pour in melted butter and stir until damp crumbs form.
Press crumbs firmly into the pan in an even layer. Dock the crust a few times with a fork.
Bake the crust 12–15 minutes until edges turn lightly golden.
Whisk eggs, brown sugar, corn syrup, melted butter, vanilla, and salt until smooth and glossy.
Whisk in the flour, then fold in chopped pecans to coat evenly.
Pour filling over the hot crust and spread the nuts into an even layer.
Bake 22–28 minutes until the center is set with a slight jiggle and the top looks shiny.
Cool completely in the pan. Lift out with parchment and cut into bars.