01 -
Preheat the oven to 350°F. Grease a 9x13-inch baking dish with nonstick spray or butter, or line it with parchment paper.
02 -
In a medium bowl or stand mixer, combine the boxed chocolate cake mix, melted butter, and egg. Mix until smooth. Press the mixture evenly into the bottom of the prepared baking dish.
03 -
In a separate bowl, blend the cream cheese and pumpkin puree until smooth and lump-free. Add the eggs, vanilla extract, cinnamon, salt, nutmeg, and cloves, mixing until combined. Gradually incorporate the powdered sugar until the batter is smooth.
04 -
Combine the flour, brown sugar, and cinnamon in a bowl. Add the softened butter and use a fork to mix until clumps form and the mixture is crumbly.
05 -
Pour the pumpkin cheesecake mixture evenly over the chocolate base layer and smooth the surface. Sprinkle the semi-sweet chocolate chips evenly on top, then distribute the crumble topping over everything.
06 -
Bake at 350°F for 50 to 60 minutes, or until the center is set but still slightly moist — not jiggly. The top should be golden brown.
07 -
Remove the bars from the oven and allow them to cool completely. For clean slices, chill in the refrigerator for about an hour before cutting.