Place the butter in your small bowl. Microwave for 15 seconds. (( This is to melt the butter. ))
The result should be a liquid.
Add the white sugar and the brown sugar...
...as well as the egg yolk and the 3 drops of vanilla extract.
Mix until smooth and combined.
Add in the flour and salt. Mix again :)
The result should be doughy.
Mix in the chocolate chips.
Microwave the concoction for 40 to 60 seconds :)
Voila! You can eat in the bowl, oooor....
...you can serve it on a plate with the toppings of your choice!