Best Chocolate muffins

I was searching for a chocolate muffins recipe and came across this recipe at http://cherrapeno.blogspot.com/ . This muffins are the best muffins I've eaten so far. They are soft rich and really satisfy a chocolate craving. I urge you to try these. Here s the recipe :)

Chocolate Custard Muffins

Adapted from The Guardian Weekend by Dan Lepard

50g cornflour

3 level tbsp cocoa

100g dark soft brown sugar

225ml cold water

5g unsalted butter, cubed

125g dark chocolate, broken small

75ml sunflower oil

2 tsp vanilla extract

2 large eggs

125g caster sugar
125g plain flour
2½ tsp baking powder

Heat the oven to 180C/350F/gas mark 4.
Begin by making the custard. In a large saucepan, put the cornflour, cocoa, brown sugar and cold water. Whisk together over a medium heat until boiling, very thick and smooth.
Remove from the heat and beat in the butter and dark chocolate until both have melted and been absorbed.
Add the oil, vanilla and one of the eggs - beat until combined. Add the remaining egg and the caster sugar and beat until the mixture is smooth and combined.
In a mixing bowl, measure out the flour and baking powder and stir together. Sift this onto the custard and beat again until the flour is thoroughly combined.
Spoon into 12 paper muffin cases that have been put into a muffin pan and bake for 25 minutes.