Prepare the Crust: Preheat your oven to 350°F (175°C) and lightly grease a 9x13-inch baking dish. In a large mixing bowl, combine the flour, brown sugar, melted butter, and salt. Stir until a crumbly dough forms. Press the dough evenly into the bottom of the prepared baking dish. Place in the oven and cook for 12 to 15 minutes, or until the crust reaches a lovely golden hue. Remove from the oven and let it cool slightly while preparing the filling.

Make the Filling: In a separate large bowl, whisk the eggs until smooth. Add in the sweetened condensed milk, flour, brown sugar, melted butter, vanilla extract, and salt. Mix until all ingredients are fully incorporated. Gently fold in the shredded coconut, ensuring it is thoroughly mixed throughout the mixture.

Assemble and Bake: Pour the coconut filling over the pre-baked crust, spreading it out evenly. Sprinkle the remaining 1 cup of shredded coconut over the top of the filling. Cook in the oven for 25 to 30 minutes, or until the top turns a beautiful golden brown and the filling has firmed up.

Cool and Serve: Allow the coconut bars to cool completely in the baking dish before cutting them into squares. For best results, chill them in the refrigerator for about 30 minutes before serving. Enjoy as a delicious treat with coffee or tea!