Prepare the Sweet Potatoes: Roast at 400°F (200°C) for 45–50 minutes until tender. Let cool, peel, and mash until smooth.
Mix the Filling: Combine mashed potatoes and melted butter. Add sugars, eggs, milk, vanilla, cinnamon, and nutmeg. Whisk until fully blended.
Assemble the Pie: Pour the filling into a pre-baked crust and smooth the surface.
Bake: Set oven to 350°F (175°C) and bake for 50–55 minutes until the center is just set.
Cool and Serve: Allow the pie to cool for at least 2 hours before slicing. Serve with whipped cream or a drizzle of caramel.
