Preheat the oven to 350°F (177°C).
Add the cooked sweet potatoes, melted butter, granulated sugar, brown sugar (or your preferred sweetener combination), evaporated milk, eggs, vanilla extract, ground cinnamon, and ground nutmeg to a large mixing bowl.
½ cup melted unsalted butter, 1 cup granulated sugar or brown sugar, ½ cup evaporated milk, 2 eggs, 1 teaspoon vanilla extract, 1 teaspoon ground cinnamon, ½ teaspoon ground nutmeg
Blend using an immersion blender until completely smooth and creamy. You can also use a food processor or high-powered blender. Scrape down the sides of the bowl as needed to make sure everything is evenly incorporated.
Pour the sweet potato filling into a prepared graham cracker crust. Use a spatula to smooth the top into an even layer.
9 oz Ready graham cracker crust
Bake for 20 minutes. Check in on the pie to observe the edges. If the edges are starting to brown, I like to add a piece of foil (large than the pie pan) and place it on top just to tint, not fully cover, and prevent excess browning on the crust. Bake an additional 35-45 minutes or until the edges are set and the center has a slight jiggle when gently shaken. The pie will continue to set as it cools, so avoid overbaking.
Transfer the pie to a wire rack and let it cool completely at room temperature.
I like to make my pies the day before because they area always better the next day. Refrigerate the pie for at least 4 hours, preferably overnight. Chilling helps the filling fully set and makes slicing much easier.
Slice and serve chilled or at room temperature. Top with whipped cream, if desired.