Prepare the crust: Unroll store-bought crust into a 9-inch pie pan or roll out homemade dough to a 12-13-inch circle and transfer it to the pan. Crimp the edges and refrigerate.
Preheat the oven: Set it to 350°F with a baking sheet on the lower rack to preheat.
Make the filling: Melt butter in a saucepan over medium heat, cooking until golden brown (3-5 minutes). Transfer to a bowl to cool.
Mix the filling: Whisk brown sugar, corn syrup, golden syrup, eggs, bourbon, vanilla, and salt into the browned butter until smooth.
Add pecans: Sprinkle chopped pecans into the pie crust, then pour the filling over them.
Decorate: Arrange whole pecan halves on top if desired, pressing gently into the filling.
Brush the crust: Apply beaten egg, milk, or cream to the edges of the crust.
Bake: Place the pie on the preheated baking sheet and bake for 50-55 minutes until golden and set.
Cool: Let the pie cool for about 4 hours before serving at room temperature, optionally with ice cream or whipped cream.