01 -
Set the oven to 175°C.
02 -
Combine graham cracker crumbs, granulated sugar, and melted butter in a medium bowl. Mix until the texture resembles wet sand.
03 -
Firmly press the mixture into the base and sides of a 23 cm pie dish. Bake for 8 minutes, then remove and allow to cool slightly.
04 -
In a mixing bowl, whisk egg yolks with lime zest for 2 minutes until slightly thickened. Add sweetened condensed milk and whisk until smooth. Gradually whisk in key lime juice until fully incorporated.
05 -
Pour the filling into the cooled crust and smooth the surface. Bake for 12 minutes, until the filling is just set but still slightly wobbly at the center.
06 -
Remove from oven and cool to room temperature. Refrigerate for at least 3 hours, or overnight, until thoroughly chilled.
07 -
With an electric mixer, whip cold heavy cream, powdered sugar, and vanilla until soft peaks form.
08 -
Spread or pipe whipped cream over the chilled pie before serving.