1Preheat your oven to 350°F (175°C).
In a medium saucepan, melt the unsalted butter over medium heat.
Remove the saucepan from heat and stir in the brown sugar until well combined.
Add the maple syrup, eggs, and vanilla extract to the mixture, stirring until smooth.
Place the unbaked pie crust in a pie dish and spread the pecans evenly over the bottom.
Pour the maple syrup mixture over the pecans, ensuring they are evenly coated.
Bake in the preheated oven for 45-50 minutes, or until the filling is set and the crust is golden brown.
Allow the pie to cool completely before serving.