For the Brownie batter: Beat together melted butter, sugar, and vanilla with an electric mixer. Then beat in eggs one at a time. Whisk flour and cocoa powder in small bowl, and then gradually stir into butter mixture by hand.
For the Pumpkin cheesecake mixture: Soften cream cheese in microwave. In another bowl, beat cream cheese and sugar until smooth. Beat in remainder of ingredients until smooth.
Spread about 2/3 of brownie batter into prepared pan. Drop dollops of the pumpkin batter over top, distributing evenly. Drop the remaining brownie batter over cheesecake batter. To make the swirls, run a butter knife back and forth through the pan, making figure eights.
Bake for 35-40 minutes, or until a toothpick inserted in the center comes out clean.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.