Line rimmed baking sheet with parchment paper

Mix butter and sugars together on medium high till light and fluffy- about 5 mins. add vanilla, make sure to scrape down sides...

slowly add flour and make sure it's well blended. Add chocolate chunks

Divide dough in half, placing each half on a piece of plastic wrap. Form logs and stick in fridge for 2 hours.

Cut 1/2 inch thick circles.

Dip in egg wash then demura- then sprinkle flaky salt... I dipped each individually, but you can dit the whole log and then get the outsides crispy... I wanted the tops.

Bake at 350F for 12-16 mins... let cool.