Preheat your oven to 350°F and let the unbaked pie crust sit at room temperature for five minutes. This helps it relax and prevents excessive shrinking during baking, ensuring even edges and a professional appearance.
In a large mixing bowl, cream together the butter and brown sugar until light and fluffy, approximately three to four minutes. Beat in the eggs one at a time, ensuring each egg fully incorporates before adding the next one.
Add vanilla extract and mix until combined, then sprinkle in flour, granulated sugar, cinnamon, and salt. Fold gently until no dry streaks remain, being careful not to overmix, which can result in tough, dense filling.
Stir in the pecans and corn syrup, distributing them evenly throughout this thanksgiving pecan pie crowd filling. Pour the mixture directly into the unbaked crust, spreading pecans to ensure they don't all sink to the bottom during baking.
Bake for 50 minutes to one hour until the filling is set but still slightly jiggly in the very center, about two inches from the edge. The filling should register 180°F on an instant-read thermometer when inserted near the edge.
Remove from the oven and let cool for at least 30 minutes before slicing. While cooling, whisk together heavy cream and maple syrup, then drizzle over each slice just before serving.
Store any leftovers covered in the refrigerator for up to five days. The flavors actually deepen after a day, making this an excellent make-ahead dessert for busy holiday schedules.