- Preheat the oven to 350°F. Line a standard 9 X 4-inch loaf pan with parchment paper. Set aside. 
- In a medium mixing bowl, stir together the flour, baking powder, and salt. Set aside. 
- Using an electric mixer (hand or stand mixer), mix the butter until smooth. Add the sugar and mix of medium speed for 2 to 3 minutes, or until light and fluffy. 
- Add the eggs, one at a time, and mix until combined. Add the vanilla and mix until smooth. 
- Add half of the flour mixture and stir until incorporated. Stream in the buttermilk and mix until smooth. Add the remaining flour and stir until incorporated. It's okay if a few streaks of flour remain. 
- Add the chocolate chips and fold to combine. Reserve a few for sprinkling over the top. 
- Scrape the batter into the prepared pan. Add a few chocolate chips on top. Sprinkle the top with a generous coat of granulated sugar. 
- Bake for 50 to 60 minutes, or until a wooden skewer inserted into the center of the cake comes out clean or slightly moist (not raw batter). 
- Cool the cake on a wire rack for at least 30 minutes before removing it from the pan. Continue to cool before slicing.