Preheat your oven to 325°F (163°C).
In a medium bowl, combine graham cracker crumbs, melted butter, 1/4 cup sugar, and 1 teaspoon cinnamon. Mix until well combined.
Press the mixture firmly into the bottom of a 9-inch springform pan to form the crust. Bake for 10 minutes, then remove from the oven and let it cool.
In a large mixing bowl, beat the softened cream cheese with an electric mixer until smooth and creamy.
Gradually add 1 cup sugar and vanilla extract, mixing until well combined.
Add the eggs one at a time, mixing on low speed after each addition until just combined.
Add sour cream and flour to the cream cheese mixture, mixing until smooth.
Pour the cheesecake batter over the cooled crust in the springform pan.
Bake in the preheated oven for 50-60 minutes, or until the edges are set and the center is slightly jiggly.
Turn off the oven and crack the door open, allowing the cheesecake to cool in the oven for 1 hour.
Remove the cheesecake from the oven and let it cool completely at room temperature.
Once cooled, refrigerate for at least 4 hours or overnight for best results.
Before serving, mix 1/4 cup sugar with 1 tablespoon cinnamon in a small bowl. Sprinkle this mixture over the top of the chilled cheesecake.