Preheat the oven to 350°F/180°C. Grease a 9x5 inch loaf pan with baking spray and set aside.
Mix the flour, baking soda, spices, and salt in a medium mixing bowl until combined. Set aside.
In another Mixing bowl, whisk the eggs, sugar, brown sugar, vanilla bean paste, pumpkin, buttermilk, butter, and vegetable oil until well combined.
Add dry ingredients to wet ingredients, and mix until just combined and there is visible flour remaining (being careful not to overmix).
Fold in 1 cup of chocolate chips and pour the batter into the prepared pan. Top with ¼ cup of chocolate chips.
Bake for 55 to 65 minutes or until a cake tester comes out clean. Cover it loosely with foil if the pumpkin bread is browning too fast.
Remove from oven and let it cool in the pan on a wire rack before serving.
Notes
To make this bread extra moist, you can add an additional egg to the batter.
To make this bread gluten-free, you can use a gluten-free all-purpose flour blend instead of regular all-purpose flour.
If you want a more traditional pumpkin bread flavor, you can omit the chocolate chips, add 1 cup of chopped pecans or walnuts instead, and top with pumpkin seeds.
If you want more cake-like pumpkin bread, you can add 1/4 cup of all-purpose flour to the batter.
This bread can also be made into muffins! Simply divide the batter evenly among 12 greased or lined muffin cups and bake for 18 to 20 minutes, or until a toothpick inserted into the center of a muffin comes out clean.