In a mixing bowl, combine the graham cracker crumbs, melted butter, and sugar. Stir until the mixture resembles wet sand.
Press the crumb mixture evenly into the bottom of a 9-inch round springform pan to create the crust. Bake for 10 minutes and then remove from the oven to cool slightly.
In a large mixing bowl, beat the softened cream cheese with an electric mixer until smooth and creamy.
Gradually add the powdered sugar, pumpkin puree, vanilla extract, and pumpkin spice blend to the cream cheese, mixing until well combined.
Add the eggs one at a time, mixing on low until just incorporated after each addition. Be careful not to overmix.
Sprinkle the flour into the batter and gently fold it in until smooth.
Pour the pumpkin cheesecake batter over the cooled crust, spreading it evenly with a spatula.
Bake in the preheated oven for 50-60 minutes, or until the edges are set, and the center has a slight jiggle.
Turn off the oven and crack the oven door, allowing the cheesecake to cool completely in the oven to prevent cracks.
Once cooled, refrigerate for at least 4 hours or preferably overnight to set completely.
Before serving, whip some cream and spread it on top of the cheesecake if desired. Garnish with a sprinkle of cinnamon for a festive touch.
Notes
For best results, refrigerate overnight before serving.