Preheat your oven at 170°C.
Make butter into creamy state, completely.
Add all amount of sugar and mix it!
Just like this.
Add two eggs one by one.
Then put all powder and vanilla oil into the bowl. Be careful not to mix too hard. Just make a big circle around the bowl and then draw number eleven(11) in the center carefully.
Stop mixing just as you can't see powder anymore.
Put those chocolate chunks or chips!
I prefer chunks cause they're big!
And then put all things into a plastic bag or wrap around them. Place them inside the fridge and wait for next 72 hours. - It's your choice to wait for 24 or 36 hours. But the recipe says 72 hours.
After 3 days, make them into small balls. I think ping-pong ball size would be the best.
Place balls on the pan. Of course you can use baking sheet.
Bake! For 13 min (it depends).
When the timer rings, put them out of the oven. And let them cool on the pan for about 10 min.
And then move to the cooling wrack.
Done! These cookies are more tasty on the next day so you'd better wait a little more!
Share with your family and friends. They worth to be shared.