cookie in a mug

all you need for this is a few basic ingredients, a mug and a microwave :) 

1 Tablespoon Butter1 Tablespoon Granulated White Sugar1 Tablespoon of Dark Brown Sugar1 Egg Yolk 1/4 of a Mug All Purpose Flourchoice of filling (i personally prefer chopped mars bar but works well with raisins and chocolate chips)

Method: 

1. Melt the butter in the microwave, this should take around 20 seconds 
2. Next add the brown and granulated sugar to the melted butter and mix together.
3. Add the egg yolk and flour to the mug and mix together.
4. Add your choice of filling, stir again for placing in the microwave then heat for around 60 seconds. 
5. Enjoy