Step 1: Preheat your oven to 325°F (163°C).
Step 2: In a mixing bowl, combine the graham cracker crumbs, melted unsalted butter, and granulated sugar. Press the mixture into the bottom of the springform pan to form an even layer. Bake for 10 minutes to set the crust, then let it cool.
Step 3: In a large mixing bowl, beat the cream cheese until smooth and creamy, about 2-3 minutes. Gradually add in the granulated sugar, mixing until combined.
Step 4: Add the eggs, one at a time, mixing on low speed after each addition until just combined.
Step 5: Add the sour cream and vanilla extract to the mixture and mix until smooth.
Step 6: Pour the cheesecake filling over the cooled crust. Smooth the top with a spatula.
Step 7: Place the springform pan on a baking sheet and bake for 1 hour. The cheesecake should be set around the edges but slightly jiggly in the center.
Step 8: Turn off the oven and leave the cheesecake inside for an additional hour. Afterward, let it cool to room temperature, then refrigerate for at least 4 hours or overnight.