Allow cream cheese to come to room temperature for at least 1 hour.
Preheat oven to 350 degrees Fahrenheit.
Line an 11" x 7" baking sheet with parchment paper.
In a medium bowl, add softened cream cheese, pumpkin, nutmeg, cinnamon, sugar, and the 1 egg. Mix using an electric hand mixer until combined and creamy.
Add brownie mix, eggs, oil, and water to a large mixing bowl. Using an electric hand mixer, beat until creamy.
Once brownie batter is ready, spread 3/4 of the prepared batter into your parchment-lined pan using a rubber spatula.
Alternate spoonfuls of pumpkin batter over the chocolate batter until you are finished with the batter.
Alternate adding the remaining brownie batter to the top of the pumpkin spots making a pattern.
Swirl the batters together to make a marbled effect.
Bake for 40 minutes at 350 degrees. A toothpick inserted into the center of the brownies will come out clean once ready
Cool brownies for one hour before cutting them.
Cut brownies with a plastic knife and serve. Enjoy!