Prepare the Crust: Gently press your unbaked pie crust into a 9-inch pie plate. Crimp the edges as desired.
Place the prepared crust in the refrigerator to chill for at least 30 minutes.
When ready to bake, preheat your oven to 425°F / 220°C.
Mix the Filling: In a medium bowl, whisk the eggs until they are light and frothy.
Whisk in the packed light brown sugar, pure maple syrup, and melted butter until everything is smooth and well combined.
Add Pecans & Assemble: Gently stir the whole pecans into the maple syrup mixture.
Pour the entire mixture into your chilled, unbaked pie shell.
Bake the Pie: Place the pie on a baking sheet (to catch any potential drips) and bake at 425°F / 220°C for 10 minutes.
Then, reduce the oven temperature to 325°F / 165°C and continue to bake for an additional 35 to 40 minutes.
Check for Doneness & Cool: The pie is done when the center is just barely set (it should have a slight jiggle) and a knife inserted near the center comes out clean.
Let the pie cool on a wire rack for at least 2 hours before serving. This allows the filling to set completely.
Serve warm or at room temperature, with a dollop of unsweetened whipped cream if you like.