Make the Graham Cracker Crust: Preheat oven to 350 degrees Fahrenheit. Combine graham cracker crumbs, melted butter, granulated sugar, brown sugar, ginger, nutmeg, and salt in a mixing bowl and stir until evenly coated.
1 ¾ cup graham cracker crumbs, ½ cup unsalted butter, ¼ cup granulated sugar, 2 tablespoons brown sugar, ½ teaspoon ground ginger, ½ teaspoon ground nutmeg, ¼ teaspoon fine sea salt
Firmly press the crust into the bottom and up the sides of pie pan to form the crust. Place pan in oven to par-bake crust for 15-18 minutes or until crisped up and golden. Set aside to cool.
Make the Pie Filling: While the crust par-bakes, zest key limes then juice them.
1 pound key limes
Using a stand mixer with a paddle attachment fitted or a hand mixer, beat the cream cheese until smooth (about two minutes), then beat in the egg yolks for another minute. Pour in key lime juice and zest and sweetened condensed milk, and mix until uniform and smooth.
6 ounces cream cheese, 3 egg yolks, 28 ounces sweetened condensed milk
Make the Pie: Pour and spread key lime filling into cooled pie crust then place pan into oven to bake for 10-12 minutes or until pie filling is just set and crust is golden brown.
Cool pie for about 45 minutes then transfer to refrigerator to chill and set for at least three hours.
Make the Whipped Cream: When ready to serve, add heavy cream, powdered sugar, and vanilla extract to stand mixer with whisk attachment fitted or hand mixer and beat until fluffy, stiff peaks form. Served chilled pie with whipped cream on top.
1 cup heavy cream, 3 tablespoons powdered sugar, 1 teaspoon vanilla extract