Preheat your oven to 350°F (175°C) and grease an 8x8-inch baking dish.

In a medium mixing bowl, whisk together flour, cinnamon, and salt.

In a large bowl, mix the melted butter, vegetable oil, granulated sugar, light brown sugar, and cocoa powder until smooth.

In a separate bowl, whisk together the eggs, vanilla extract, and pumpkin purée, then fold this into the chocolate mixture.

Gradually fold the dry mixture into the wet ingredients and add 3 tablespoons of chocolate chips.

Carefully pour the brownie batter into the prepared baking dish and smooth the top.

In a mixing bowl, combine cream cheese, light brown sugar, pumpkin pie spice, and remaining pumpkin purée until smooth.

Spoon dollops of the cream cheese mixture onto the brownie batter and swirl to create a marbled effect.

Sprinkle remaining chocolate chips and chopped pecans on top.

Place the baking dish in the oven and bake for 40 minutes, or until a toothpick comes out clean.

Remove from the oven and allow to cool in the pan for about 30 minutes.

Slice into squares and serve warm, optionally with ice cream or powdered sugar.