Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking pan or line it with parchment paper for easy removal.
In a large mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.
Beat in the egg and vanilla extract until fully incorporated.
In a separate bowl, whisk together the flour, baking powder, baking soda, cinnamon, nutmeg, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Fold in the pumpkin puree until evenly distributed.
Pour the pumpkin cookie mixture into the prepared baking pan, spreading it evenly across the bottom.
In another bowl, beat the softened cream cheese until smooth.
Add the granulated sugar and continue beating until fully combined.
Beat in the egg, vanilla extract, and flour until smooth.
Finally, mix in the ground cinnamon.
Carefully dollop the cheesecake mixture over the pumpkin cookie layer in the baking pan. Using a spatula or the back of a spoon, gently swirl the cheesecake into the pumpkin layer for a marbled effect.
Bake in the preheated oven for 30-35 minutes, or until the edges are set and the center slightly jiggles. Allow the bars to cool in the pan on a wire rack.
Once cooled, refrigerate the bars for at least 2 hours before slicing into squares. This will help the layers set properly.
Once chilled, cut into bars and serve. These bars are delicious on their own but can also be served with a dollop of whipped cream or a sprinkle of cinnamon on top.
Notes
These bars are best served chilled and can be topped with whipped cream.