- Make the crust: Preheat oven to 325 degrees. Combine graham cracker crumbs and sugars. Pour melted butter over crumb mixture and combine. Spread evenly along the bottom and sides of a 9-inch pie pan, using the bottom of a glass or your fingers to press down. Bake for 10 minutes, then set aside to cool before adding filling.
- Make the filling: Increase oven temperature to 350 degrees. In a mixing bowl, combine filling ingredients. Pour into cooled pie crust and bake for 12 minutes. Set aside to cool at room temperature for 15 minutes, then refrigerate.
- Make the whipped cream: Whisk ingredients until your forearms hurt (and whipped cream holds its shape). Dollop onto pie and top with more lime zest.