Preheat the oven to 350°F (180°C). Grease the sides and bottom of a standard-sized loaf pan or use parchment paper. Melt the butter in the microwave.
In a large bowl, combine all of the dry ingredients except for the chocolate chips and nuts. This will include flour, sugar, baking powder, baking soda, cocoa powder, cinnamon, nutmeg, ground cloves, and ginger.
Form a well in the center of the flour mix and add to it the pumpkin, melted butter, and vanilla. Swirl them together and then combine the wet and dry ingredients just until combined. Gently fold in the chocolate chips and walnuts.
Spoon the batter into the loaf pan and smooth out the top with a spatula or spoon. Bake the bread for 50-60 minutes or until a toothpick comes out mostly clean. Note: I say “mostly clean” because melted chocolate chips will stick to it.
Let the bread cool down before slicing it and enjoy it now or save slices for later!