Chocolate Chip Mug Cookie

(Thanks to:http://nu.spoonuniversity.com/recipe/...)

INGREDIENTS1 tablespoon ( oz/ 15g) room temperature butter1 tablespoon white sugar1 tablespoon dark brown sugar tsp vanilla extract, a tiny splash1 egg yolk (do not use egg white)3 tablespoons all purpose flourPinch of salt2 tablespoons of chocolate chips

METHOD1. In a microwavable mug mix the butter and sugars together.2. Add egg yolk and vanilla and continue mixing .3. Stir in flour, salt and chocolate chips, then mix until all ingredients are fully combined.4. Microwave for 40-60 seconds (check after 40 seconds to check if it is done, you might have to play around with the timing as all microwaves are different)5. IMPORTANT NOTE:My microwave is 1200 Watts and my cookie took 40-45 seconds. Dont over cook or they can dry out. Mug cookies are best eaten while still warm6. Try topping your creation with whipped cream or vanilla ice cream and chocolate sauce