Preheat the oven to 190°C (380°F)...Line a square tin with foil and apply some butter on it...
In a sauce pan add butter,sugar and melt it down.
Add in cocoa and mix well.Now add in the flour,baking soda,salt and mix well.
Add in eggs,vanilla and mix till it becomes smooth consistency.
Now fold in the chopped milk chocolate and mix well.
Tip this in to the tin and bake it in the oven for 25-30 min.
Insert a knife it will have some moist crumbs in it.
Cut into squares and enjoy with a glass of milk or a scoop of vanilla icecream....