Mix flour, baking soda, salt, baking powder and set aside.
With a hand or stand mixer, beat the butter until fluffy about 2 minutes.
Add the sugars and continue beating until integrated and fluffy , about 3 additional minutes. Then add the dry mixture in two portions, beating each time on medium.
Cover dough with plastic wrap and chill in the fridge overnight. You can chill for as low as 30 m but I find the longer you chill the better it holds shape later on (less spread, less flat of a cookie).
Preheat oven to 350 C.
Line baking sheet w/ parchment paper, and use a 1.5 tablespoon cookie scoop to scoop cookie onto the sheet. Leave at least 2 inches in between each cookie to account for spread.
Bake for 10 minutes, open the pot and waring a thick glove, bang the cookie sheet against the rack to help the chocolate spread out into a puddle shape.
Bake another 12 minutes. Take out and let cool on baking pan additional 5 minutes. Meanwhile crush pyramid salt in between your fingers and sprinkle on the cookies.
Transfer to cooling rack to cool completely, serve when still a little warm!