Preheat oven at 180 deg C for 10 mins.To a mixing bowl - add an egg, sugar and butter.
Add milk to it whisk it well.
Then add vanilla essence mix well.Now sieve flour and baking powder to it.
Mix well without any lumps.Now add 1/3 cup chopped white chocolate.
Fold it with a spatula, do not overmix.Using a icecream scooper scoop out.
Line muffin liners to the muffin pan.Add the batter till 3/4 th og the liner.Top with chocolate chopped.
Bake in preheated oven at 180 deg C for 18-20 mins ir until a tooth inserted at center comes out clean without sticking.