Start the oven on warm air at 175 degree Celsius.
Cut the chocolate in small pieces.
Mix the sugar and the eggs in a bowl.
Pour in the rest of the dry ingredients, and stir it together.
Pour in the margarine and 2/3 of the chocolate in the mixture and stir.
Divide the mixture in muffin forms, do not fill them more then ¾.
Sprinkle the rest of the chocolate on the top of the muffins.
Put the muffins in the middle of the oven for 8 minutes.
Take out the muffins and let them cool down.