Step 1: Prepare the Sweet Potatoes

• Preheat your oven to 350°F (175°C).
• Place the cubed sweet potatoes in a large pot, cover with water, and bring to a boil.
• Cook until fork-tender, about 15–20 minutes.
• Drain the sweet potatoes and allow them to cool slightly.
• Mash thoroughly until smooth and set aside.

Step 2: Prepare the Pie Crust

• Roll out the all-butter pie crust and fit it into a 9-inch pie dish.
• Trim excess dough and crimp the edges for a decorative finish.
• Place the crust in the refrigerator to chill while preparing the filling.

Step 3: Make the Sweet Potato Filling

• In a large mixing bowl, beat the softened butter and granulated sugar together until well combined.
• Add the mashed sweet potatoes, cinnamon, nutmeg, salt, egg, vanilla extract, baking powder, and milk.
• Mix until smooth and creamy using a hand mixer or whisk.

Step 4: Assemble the Pie

• Pour the sweet potato filling into the chilled pie crust, smoothing the top with a spatula.
• Place the pie on the center rack of your preheated oven.

Step 5: Bake the Pie

• Bake at 350°F (175°C) for 50–60 minutes, or until the filling is set and the crust is golden.
• A knife inserted into the center should come out mostly clean.
• Let the pie cool to room temperature before slicing.

Step 6: Serve and Enjoy

• Slice the pie and serve it plain or with a dollop of whipped cream for extra indulgence.