Preheat oven to 350 degrees F. Spray a 9x5” loaf pan with cooking spray and set aside.
In a medium bowl, add sugar, pumpkin puree, melted butter, eggs, milk and vanilla extract. Whisk to combine.
In a small bowl, add flour, pumpkin pie spice, baking powder, baking soda and salt. Stir to incorporate.
Add the flour mixture to the bowl of wet ingredients. Fold to combine.
Divide the batter evenly between the two bowls used. Add cocoa powder to one, and add the remaining ¼ cup of flour to the other. Stir to incorporate.
Use a cookie scoop to create two horizontal rows of batter, alternating between pumpkin and chocolate scoops. Add a scoop of pumpkin, chocolate, then pumpkin on one side (horizontally). Add a scoop of chocolate, pumpkin, then chocolate for the second row. Tap the pan on the counter a few times to allow the batter to spread evenly in the bottom of the pan. Repeat this process with alternate batters on top - being sure to use all remaining batter.
Use a skewer to swirl the batter into figure eights, creating a marbling effect in the loaf.
Place loaf pan in preheated oven and bake for 50-60 minutes or until a toothpick inserted in the center comes out clean. Cool for 20 minutes before enjoying.
This recipe makes 1 loaf or 12 muffin-sized servings.If turning into muffins bake for 20 - 25 minutes at 350.