Preheat the oven to 350°F (175°C).
Prepare the crust by mixing flour and powdered sugar in a bowl.
Stir in melted butter until the mixture resembles coarse crumbs.
Press the mixture into a greased 8x8-inch baking dish, creating an even layer.
Bake the crust for 15 minutes or until lightly golden.
In a mixing bowl, whisk together the maple syrup, eggs, vanilla, and salt.
Fold in the chopped pecans until they are well incorporated.
Pour the pecan filling over the baked crust and spread evenly.
Bake for an additional 25-30 minutes, or until the filling is set and slightly jiggly in the center.
Remove from oven and let cool completely before slicing into bars.