Nigella's Chocolate Chocolate-Chip Muffin

I came across this Nigellas Chocolate Chocolate-Chip Muffins recipe in SmallSmallBaker blog and was so tempted to try it out. But i made some changes to it.

Nigella's Chocolate Chocolate-Chip Muffins

Ingredients (makes 12 muffins)
250g plain flour (I use self-raising flour)
2 tsp baking powder (I omit it)
1/2 tsp baking soda
2 tbsp best quality cocoa powder
175g caster sugar
150g chocolate chips (save 1/4 of the chips for sprinkling)
250ml milk (I use evaporated milk)
90ml vegetable oil (I use melted butter)
1 large egg (I use 2 medium egg as i do not have large egg)
1 tsp pure vanilla extract

Method :

1. Preheat the oven to 200 deg C.

2. Put the flour, baking powder, baking soda, cocoa, sugar, and 3/4 of the chocolate chips into a large bowl and mix well.

3. Pour all the liquid ingredients into a measuring jug and mix well.

4. Mix the dry and wet ingredients together with slow and gentle strokes. Stop stirring once the last traces of flour disappear. Do not overmix. A lumpy batter will ensure the muffins stay moist and fluffy.

5. Spoon the batter into paper muffin cases.

6. Sprinkle the remaining 1/4 chocolate chips on top and bake for 20 minutes or until the muffins are dark, risen and springy.