Sift together the flour, cocoa powder, and baking powder.
In a bowl, mix sugar and eggs together.
Add milk and melted butter, and mix well.
Add the dry ingredients and fold with a spatula.
Mix in the chocolate chips into the dough.
Shape the dough into balls and place them on a baking sheet.
Bake in a preheated oven at 180°C for 20 minutes.