Preheat your oven to 350˚F (175˚C). In a large bowl, prepare the brownie mix according to the directions on the package, whisking until smooth. Set aside.

In a separate medium bowl, using a hand mixer, beat the softened cream cheese, pumpkin puree, granulated sugar, large egg, and pumpkin pie spice until the mixture is smooth and well combined.

Grease an 8x8 inch or 9x9 inch square baking dish. Spread about three-fourths of the brownie batter evenly across the bottom of the prepared dish. Carefully drizzle and pour all of the pumpkin batter over this bottom layer of brownies. Lastly, dollop the remaining brownie batter over the pumpkin mixture. Using a butter knife or a skewer, swirl the brownie and pumpkin batters together to create a marbled look.

Bake in the preheated oven for 50 minutes, or until a toothpick inserted into the center comes out clean. Allow the brownies to cool completely before cutting and serving. Store any leftover brownies covered in the refrigerator.