Preheat oven to 350ºF. Spray a loaf pan with non-stick baking spray or line with parchment paper.
In a bowl whisk together the flour, cocoa powder, baking powder, baking soda, and salt. Once well blended set aside.
In a separate bowl mix together buttermilk, eggs, butter, brown sugar, sugar, and vanilla until smooth and the eggs are fully incorporated.
Add the flour to the egg mixture and mix until it is just combined. Add ½ cup of the chocolate chips and mix until evenly incorporated.
Pour batter into the prepared loaf pan and top with the remaining chocolate chips. Bake for 50-60 minutes or until a tester comes out clean.
Remove from the oven and let cool for 10 minutes before removing to a wire rack to cool completely.
Slice once the bread is completely cooled.
