Black & white chocolate bits cookies

Recipes : ( from Good food magazine - Aus )
Ingredients :
- 125g unsalted butter , softened
- 110g caster sugar
- 1/2 tsp vanilla extract
- 1 egg
- 300g plain flour
- 1/2 tsp baking powder
- 2 tbsp milk
- 95g white choc bits
- 95g dark choc bits
Method :
Preheat oven to 180 degree C . Line 2 baking trays with baking paper . Beat butter , sugar & vanilla until light and fluffy . Add egg and beat until combined . Sift in combined flour & baking powder and stir lightly . Add milk and choc bits , stir to combine .
Roll heaped tbsp of mixture into balls . Place on prepared trays and flatten slightly , allowing at least 3 cm between each cookie for spreading . Bake for 15 mins , until light golden . Stand on trays for 5 mins , then transfer to a wire rack to cool .