Preheat oven to 350 degrees and spray your 9x5 loaf pan with pam baking spray
Using a medium bowl, whisk together the flour, cocoa, pumpkin pie spice, baking soda, and salt
Using a large bowl, beat together until combined the pumpkin puree, brown sugar, canola oil, buttermilk, eggs, vanilla, and bourbon
Gradually whisk in the dry ingredients
Fold in ¾ C of the chocolate chips
Scoop and smooth batter into the loaf pan
Place into the oven for 30 minutes
When the 30 minutes is up, sprinkle the remaining chocolate chips onto the top of the bread
Continue to bake for another 20-30 minutes or until a toothpick comes out clean
Allow to cool completely before enjoying!