
Preheat your oven to 350°F (175°C).
In a medium bowl, combine 1 cup of graham cracker crumbs, ¼ cup granulated sugar, and ⅓ cup melted unsalted butter. Mix until fully combined.
Press the mixture into the bottom of a springform pan to form an even layer.
Bake in the preheated oven for 8-10 minutes until lightly golden. Remove from oven and allow to cool.
In a large mixing bowl, beat 16 oz softened cream cheese, 1 cup granulated sugar, and 1 tsp vanilla extract together with an electric mixer until smooth.
In a separate bowl, whip 1 cup heavy cream until soft peaks form.
Gently fold the whipped cream into the cream cheese mixture along with ½ cup fresh lime juice and the zest of 2 limes. If using, add 1 envelope unflavored gelatin, mixing until just incorporated.
Pour the cream cheese mixture over the cooled graham cracker crust, spreading evenly.
Cover with plastic wrap and chill in the refrigerator for at least 4 hours to set.
In a mixing bowl, whip 1 cup heavy cream and ¼ cup powdered sugar together until stiff peaks form.
Gently fold in 1 tbsp fresh lime juice until fully blended.
Once the cheesecake has set, spread the mousse mixture over the top of the cheesecake.
Garnish with additional lime zest for a fresh touch.
Keep the cheesecake chilled until ready to serve, then slice and enjoy!