Preheat the Oven:
Preheat your oven to 350°F (175°C). Lightly grease a 9-inch springform pan.
Make the Crust:
In a medium bowl, mix the graham cracker crumbs, sugar, and melted butter until fully combined.
Press the mixture firmly into the bottom and slightly up the sides of the springform pan.
Bake for 15 minutes, then remove and allow to cool completely.
Prepare the Filling:
Using an electric mixer on medium speed, beat the cream cheese, sugar, and sour cream until smooth and creamy.
Add the eggs one at a time, mixing well after each addition.
Mix in the cinnamon and vanilla extract until just combined.
Bake the Cheesecake:
Pour the filling into the cooled crust and smooth the top with a spatula.
Bake at 350°F (175°C) for 15 minutes.
Reduce the oven temperature to 200°F (95°C) and continue baking for 2 hours to 2 hours 10 minutes, until the center is set but slightly wobbly.
Cool the Cheesecake:
Remove from the oven and gently run a thin knife or offset spatula around the edge to loosen.
Return the cheesecake to the oven (turned off) and leave for 2 hours to finish setting.
Add the Topping:
Combine the cinnamon and sugar, then sprinkle evenly over the cheesecake’s surface.
Cover loosely and refrigerate overnight. The topping will develop a thin, snickerdoodle-like crust as it chills.
Serve:
Slice with a warm knife for clean cuts.
Garnish with whipped cream before serving.