1In a bowl mix flour , baking soda and cocoa powder.
2Sift it thrice.
3Melt 120 gms of salted butter in microwave.
4Wash and clean the blueberries.
5Keep the orange zest ready.
6Pre heat the oven at 150 degrees C.
7Keep the muffin tin ready.
8Chop the chocolate chips into small pieces.
9In another bowl, beat eggs and castor sugar. Add melted butter.
10Mix chocolate chips and flour mixture.
11Now gently fold the dry and wet ingredients.
13Add blueberries and orange zest.
14Do not stir . Add 1 tbsp of milk if the batter is too thick.
15Transfer it to the prepared tin. Bake at 150 degrees C for 20-25 minutes or until done.