1
Brown the butter and let it cool.
2
Add the sugars and stir. Add the eggs and vanilla, then stir. Add the flour, salt, baking soda, and baking powder, then combine. Stir in the chocolate chunks and chocolate chips next.
3
Spread the dough on a prepared pan. Then, bake.
4
Sprinkle with flaky sea salt and let cool before cutting into squares.