01 - Preheat the oven to 350°F.
02 - In a medium bowl, mix graham cracker crumbs, sugar, and melted butter until evenly combined.
03 - Press the mixture firmly into the bottom and up the sides of a 9-inch pie dish.
04 - Bake the crust for 8 minutes. Remove and let cool slightly.
05 - In a separate bowl, whisk egg yolks until slightly thickened, then stir in sweetened condensed milk, lime zest, and lime juice until smooth and creamy.
06 - Pour the filling into the cooled crust and spread evenly.
07 - Bake the pie for 12 minutes, until just set but still slightly wobbly in the center.
08 - Remove from the oven and cool to room temperature.
09 - Refrigerate for at least 2 hours, or until fully chilled.
10 - For the whipped cream, beat heavy cream, powdered sugar, and vanilla extract with a hand mixer until soft peaks form.
11 - Spread or pipe the whipped cream over the chilled pie just before serving.