Preheat oven to 350 convection bake setting. (375 without convection)
In a mixer, beat the cooled brown butter with both sugars 2 minutes.
Add egg and yolk and beat until creamy. Add vanilla.
Add all the dry ingredients and mix just to combine.
Add chips.
Weigh dough into 70 gram mounds and form them tall. (Also fabulous as 4 ounce mounds baked on 3rd rack up.)
Freeze a few hours and bake on parchment lined sheets for approx 12 minutes. I used the 2nd rack up from the bottom in my oven.
Sprinkle on a few sea salt flakes and let cool on sheets.