Beat the sugar and butter until fluffy, add the eggs and beat well again. Mix all the dry ingredients, except for the chocolate drops, and gradually stir into the batter. Finally, add 2/3 of the chocolate chips and the milk. Prepare the muffin tin with the cups and spread the batter into the moulds, preferably with two spoons. Sprinkle the remaining chocolate drops on top of the muffins and bake at 170°C for approx. 30 minutes.