Preheat oven to 350°F or 175ºC.
In a large bowl, cream the butter and sugar together until light and fluffy.
Next, add one egg at a time and incorporate before adding the second egg.
Mix in the milk and vanilla extract.
Sift the flour, salt and baking powder and mix until just combined. Take care not to overmix.
Lastly, add in the chocolate chips and mix well.
Line a muffin tin with muffin cups or grease with non stick cooking spray.
Fill each muffin tin up ¾ of the way full with batter.
Bake for 20-25 minutes or until the top is golden brown and when a toothpick is inserted. it comes out clean.