Heat the oven to 350 degrees Fahrenheit. Set the Keebler Extra Serving crust on a rimmed baking sheet. Scatter the dark brown sugar across the bottom crust into an even layer.
1 Keebler Ready Crust Graham Cracker Pie Crust, ¼ cup packed dark brown sugar
Pierce each sweet potato several times with a fork. Lay the sweet potatoes on paper towels inside the microwave. Cook on full power for 5 minutes. Turn the potatoes over and microwave for another 4 to 6 minutes until soft throughout. Set the potatoes aside for 10 to 15 minutes until cool enough to touch.
2 pounds sweet potatoes
Slice the sweet potatoes in half lengthwise. Scoop the flesh with a spoon, leaving the skins behind. Measure 2 cups of the warm sweet potato flesh into a medium mixing bowl. Add the softened butter. Beat with an electric hand mixer on medium speed for 1 minute, until completely smooth and free of potato fibers.
2 Tablespoons unsalted butter
In a separate bowl, whisk together the eggs, egg yolks, sweetened condensed milk, maple syrup, freshly grated nutmeg, vanilla extract, maple extract, and table salt.
3 large eggs, 2 large egg yolks, 14- ounce can sweetened condensed milk, 3 Tablespoons pure maple syrup, ½ teaspoon freshly grated nutmeg, ½ teaspoon pure vanilla extract, ½ teaspoon maple extract, ¼ teaspoon table salt
Pour the egg mixture into the pureed sweet potatoes. Beat with the hand mixer on low speed for 30 seconds, until fully incorporated.
Pour the custard over the brown sugar layer inside the graham cracker crust.
Bake at 350 degrees Fahrenheit for 45 to 50 minutes. The edges will look firm. The center will still wobble slightly when you gently wiggle the pie.
Transfer the pie to a wire rack. Cool completely at room temperature for 2 hours and 30 minutes. Slice and top each piece with freshly whipped cream and a light dusting of ground cinnamon.
1 cup cold heavy whipping cream, Ground cinnamon for dusting