Preheat Oven: Preheat your oven to 325°F (163°C). Wrap the outside of a springform pan with aluminum foil to prevent leakage.
Make Crust Mixture: In a mixing bowl, combine graham cracker crumbs, sugar, cinnamon, and melted butter until the mixture resembles wet sand.
Form Bottom Crust: Press half of the crust mixture firmly into the bottom of the springform pan. Bake for 10 minutes, then set aside to cool slightly.
Prepare Cheesecake Filling: In a large bowl, beat cream cheese and sugar until smooth and creamy. Add sour cream and vanilla; mix well.
Add Eggs: Add eggs one at a time, beating on low speed after each addition until just combined. Do not overmix.
Pour Filling: Pour the cream cheese mixture over the baked crust.
Top Crust Layer: Sprinkle the remaining crust mixture evenly over the top of the cheesecake batter. Gently press down to create a firm top crust.
Bake Cheesecake: Place the pan into a larger baking pan and fill halfway with hot water. Bake for 60–70 minutes or until the center is set but still slightly jiggly.
Cool Gradually: Turn off oven, crack door open, and let cheesecake sit inside for 1 hour.
Chill: Remove, cool completely, then refrigerate at least 6 hours or overnight before slicing.