Preheat oven to 350°F (175°C) and line an 8x8-inch baking pan with parchment paper

Beat cream cheese in a large mixing bowl until smooth

Add pumpkin puree, sugar, egg, vanilla, salt, pumpkin spice, and cinnamon

Mix until well combined and creamy

Prepare the brownie batter according to package directions in a medium bowl

Stir in ¾ of the chopped chocolate

Spread ¾ of the brownie batter evenly into the prepared pan

Dollop spoonfuls of the pumpkin mixture and remaining brownie batter on top

Use a butter knife to gently swirl the batters together to create a marbled effect

Sprinkle the remaining chopped chocolate over the top

Bake for 45–50 minutes or until edges are set and a toothpick inserted in the center comes out mostly clean

Cool completely before slicing into squares