Step 1: Prepare the Crust

1. Preheat oven to 325°F (163°C) and grease a springform pan.
2. Crush graham crackers into fine crumbs and mix with melted butter and granulated sugar.
3. Press mixture firmly into the bottom of the pan and bake for 8-10 minutes. Let cool.

Step 2: Make the Cinnamon Filling

1. In a small bowl, mix brown sugar and cinnamon until well combined. Set aside.

Step 3: Prepare the Cheesecake Batter

1. In a large mixing bowl, beat cream cheese until smooth.
2. Add sugar and mix until fully combined.
3. Incorporate eggs one at a time, mixing after each addition.
4. Add sour cream, vanilla extract, and flour. Mix until smooth.

Step 4: Assemble the Cheesecake

1. Pour half of the cheesecake batter over the prepared crust.
2. Sprinkle half of the cinnamon sugar mixture over the batter.
3. Swirl gently with a knife to create a marbled effect.
4. Repeat with remaining batter and cinnamon mixture.

Step 5: Bake

1. Place cheesecake in a water bath to prevent cracking.
2. Bake for 50-60 minutes, until the center is slightly jiggly but set.
3. Turn off oven and leave cheesecake inside with door slightly open for an hour.
4. Refrigerate for at least 4 hours or overnight.

Step 6: Make the Cream Cheese Icing

1. Beat cream cheese until smooth.
2. Add powdered sugar, heavy cream, and vanilla extract. Mix until creamy.
3. Drizzle over cooled cheesecake before serving.