In a medium bowl, combine graham cracker crumbs, granulated sugar, and melted butter. Press the mixture into a 9-inch pie plate.
Bake for 8 to 10 minutes, until the crust is golden brown. Set aside and let cool.
In a large bowl, whisk together the condensed milk, lime juice, lime zest, salt, and nutmeg. Pour the mixture into the cooled crust.
Bake for 18 to 20 minutes, until the center of the pie is set. Cool completely.
In a medium bowl, whip the cream until soft peaks form. Add the confectioners' sugar and whip until stiff peaks form. Spread the whipped cream over the cooled pie.
Refrigerate the pie for at least 1 hour before serving.
Interesting Facts
Key limes are smaller and more tart than regular limes.
This pie is a classic American dessert.
The classic Key Lime Pie is usually made with condensed milk and key lime juice.