Preheat your oven to 350°F (175°C).
Grease a 1-pound loaf pan generously with butter or cooking spray.
In a medium mixing bowl, whisk together the sugar, flour, baking powder, and salt until well combined. Set aside.
In a large mixing bowl, beat together the egg, milk, and vegetable oil until smooth.
Gradually add the dry mixture into the wet mixture, stirring gently until just combined.
Fold in 1¼ cups of chocolate chips into the batter, reserving ¼ cup for topping. Pour the batter into the prepared loaf pan and sprinkle on the reserved chocolate chips. Bake for 50-60 minutes or until a toothpick comes out clean.