Prepare Cinnamon Sugar: In a small bowl, mix 1 tablespoon ground cinnamon with 1/2 cup granulated sugar until well combined. Set aside.
Preheat and Prep Pan: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan generously with cooking spray or butter. Sprinkle 1–2 tablespoons of the cinnamon sugar mixture evenly on the bottom of the prepared pan.
Create Base Layer: Open one tube of crescent roll dough. Unroll it carefully and press the seams together firmly to form a single rectangular sheet. Place this sheet into the prepared pan, ensuring it covers the bottom completely. Press gently to adhere to the pan.
Make Cheesecake Filling: In a mixing bowl, beat softened cream cheese with an electric mixer on medium speed for 1-2 minutes until completely smooth. Add 3/4 cup sugar, egg, and vanilla extract. Continue beating until the mixture is light, fluffy, and creamy with no lumps remaining.
Add Cheesecake Layer: Pour the cream cheese mixture over the base layer in the pan. Use a rubber spatula to spread it evenly to all corners, creating a smooth uniform layer.
Top Layer and Butter Coating: Open the second tube of crescent roll dough and repeat the process of sealing seams to form one rectangular sheet. Gently place it over the cheesecake filling without pressing down hard. Pour melted butter over this top layer and spread it evenly using a spoon or pastry brush, covering the entire surface.
Add Cinnamon Sugar Topping: Sprinkle the remaining cinnamon sugar generously and evenly over the buttered top layer, ensuring complete coverage for maximum flavor.
Bake to Perfection: Place the pan in the preheated oven and bake for 26–30 minutes, or until the crescent dough is puffed and golden brown. The center should jiggle only slightly when gently shaken. Remove from oven and cool on a wire rack.
Chill and Serve: Once cooled to room temperature (about 30 minutes), transfer the pan to the refrigerator. Chill for at least 3 hours or overnight to allow the layers to set completely. Slice into 16 bars before serving. Garnish with optional toppings like dulce de leche, chocolate sauce, fresh strawberries, or whipped cream if desired.