preheat oven to 175°C/340°F

grease 9x9 inch pan

melt the chocolate in the microwave or double boiler, set aside. let it cool off

melt the butter or the margarine, set aside. let it cool off

sifted ingredient 1-6 in a bowl, give it a little whisk untill all the ingredients incorporated. set aside.

mix ingredient 7-10 plus the melted chocolate with a mixer in a bowl until all incorporated

pour in 1/3 of the melted butter and 1/3 of the mixed dry ingredients to the wet batter, let it incorporate. repeat the step until the butter and mixed dry ingredients ran out

pour the batter to the pan and sprinkle the chocolate chips on the top of the batter as much as you need. and put it in the oven for 30-35 mins.