Preheat the oven to 350°F (177°C) and grease a 8 x 4 loaf pan.
Whisk together baking powder, flour, and salt in a medium bowl.
Mix butter and sugar until creamy, then add eggs, sour cream, and vanilla extract.
Combine dry ingredients (Step 2) with wet ingredients, adding milk slowly. Mix until just combined.
Gently fold in chocolate chips.
Pour batter into the greased loaf pan and bake for 60 to 75 minutes.
Cool your cake in the pan on a rack for one hour before removing.