Preheat oven to 180°C.

Cream butter with the sugar until no sugar sound.

In another bowl, beat egg with vanilla extract.

Gradually add the egg mixture into the creamed butter and sugar. Stir to combine.

Sift flour in a bowl.

Gradually add sifted flour into the butter-egg mixture. Stir to combine.

Stir in chocolate chips. Then add in the milk. Stir to combine.

Line the cupcake tray with paper or you could just grease them with butter.

Put tablespoons of the raw cupcake mixture in the cupcake tray.

Bake in preheated oven for 30-40 minutes, or until golden brown.