Preheat oven to 425°F (218°C). Place rack in center of oven. Line standard muffin pan with paper liners. Set aside.
In a large bowl, whisk flour, baking powder and salt. Set aside.
In a separate bowl, whisk together the granulated sugar, melted butter, eggs, milk, and vanilla extract until the mixture is well combined.
Sift in the dry ingredients and mix until combined.
Add chocolate chips and mix.
Divide the batter into the 12 muffin cups. Sprinkle some chocolate chips on top of each muffin. Bake at 425°F (218°C) for 5 minutes, then, keeping the muffins in the oven, reduce the oven temperature to 350°F (180°C) and continue to bake for 15-18 minutes or until a toothpick or cake tester inserted into the center of a muffin comes out clean with a few crumbs or melted chocolate (not wet batter).
Allow to cool for 10 minutes in pan before serving.