1. Pre-heat oven to 350°F.
2. Line 18 cupcake molders with baking paper.
3. Set aside.
4. In a thick saucepan, melt together the butter and the chocolate.
5. Set aside to cool down for about 15 minutes.
6. In a medium mixing bowl, combine flour, cocoa powder,baking powder, baking soda and salt.
7. Set aside.
8. In a large mixing bowl, combine the eggs, sugar and milk.
9. Beat at medium speed until blended.
10. Pour in the chocolate-butter mixture.
11. Continue to beat until well incorporated.
12. Then, add the flour mixture.
13. Beat until no trace of flour is visible.
14. Using a rubber scraper, stir in the chocolate chips.
15. Divide the batter equally among the prepared molders. Bake for 15 to 20 mins or until a toothpick inserted in the center comes out clean.