Preheat your oven to 325°F (163°C).
Prepare the crust: In a medium bowl, mix graham cracker crumbs and melted butter until well combined.
Press the crust mixture into the bottom of a 9-inch springform pan, ensuring it is even and compact.
Bake the crust for 10 minutes, then remove and let cool.
In a large mixing bowl, beat the softened cream cheese until smooth and creamy.
Gradually add the sugar while continuing to beat the mixture until fully incorporated and smooth.
Add eggs one at a time, mixing on low speed after each addition until just combined.
Mix in the sour cream, vanilla extract, and lemon zest until fully combined.
Pour the filling over the cooled crust, smoothing the top with a spatula.
Bake in the preheated oven for about 50-60 minutes or until the edges are set but the center is slightly jiggly.
Turn off the oven and crack the oven door, allowing the cheesecake to cool gradually.
Refrigerate the cheesecake for at least 4 hours, preferably overnight, before serving.