Double Chocolate Banana Muffin

I had some overriped bananas in the refrigerator that was calling me.  Need to clear them and I was thinking of something chocolaty. After checking the internet, I ended up with this. Recipe is taken of a magazine and not only it was easy, but they came out delicious. I have made some modification to the flour but I would encourage you to try the original recipe

Double Chocolate Banana Muffin

What you need:
1 1/2 cup plain flour (I used white whole wheat)
1 cup sugar
1/4 cup cocoa powder
1 tsp baking soda
1/2 tsp salt
1/4 tsp baking powder
1 1/2 cup mashed bananas
1 large egg
1/3 cup oil/melted butter
1 cup chocolate chips
*1/4 cup milk (this is not in the original recipe. I added because my batter was really dry due to the flour I used)

What you do:
1. In a large bowl, sift and combine all the dry ingredients
2. In a small bowl, combine bananas, oil and egg and stir into dry ingredients until moistened. Add milk if batter is really dry. Fold in chips 
3. Fill paper lined muffin cups 3/4 full

4. Baked at 170C for 20-25 mins or until toothpick inserted near the centre comes out clean