In a medium bowl, combine graham cracker crumbs, melted butter, and 2 tablespoons of sugar. Mix until crumbly and press into the bottom of a 9-inch springform pan. Bake for 10 minutes, then allow to cool.
In a large mixing bowl, beat the softened cream cheese with 1 cup of sugar and vanilla extract until smooth and creamy.
Mix in the eggs one at a time until fully incorporated. Add ground cinnamon, sour cream, and heavy cream, and beat until everything is well combined.
In a small bowl, mix together brown sugar and 1 tablespoon ground cinnamon. Drizzle half of the cheesecake batter over the crust. Sprinkle half of the cinnamon-sugar mixture over the batter and swirl gently with a knife. Pour the remaining cheesecake batter on top and repeat the swirl with the remaining cinnamon-sugar mixture.
Place the springform pan into a larger baking dish filled with hot water (water bath) to prevent cracks. Bake for about 60-70 minutes or until the edges are set but the center slightly jiggles.
Turn off the oven and crack the oven door, allowing the cheesecake to cool in the oven for an hour. Then, transfer to the fridge and chill for at least 4 hours or overnight.
In a small bowl, whisk together the powdered sugar and milk until smooth.
Remove the cheesecake from the springform pan, drizzle with glaze, and slice into wedges to serve.