Mix melted butter (cooled to room temperature to avoid spreading), brown sugar, sugar, vanilla, and eggs in a large bowl. Whisk smooth.
1
Mix in all-purpose flour, baking soda, powder, cornstarch, and salt. Mix with a rubber spatula until just mixed.Mix with both chocolate chips. Heat the oven to 350°F. Use parchment on two cookie sheets.
2
Let dough rest while oven heats before scooping.Large cookie scoop (3 tablespoons). Per sheet, scoop 6 cookie dough balls. Sprinkle chocolate chips on cookie doughs.
3
Bake each cookie sheet by itself. Bake 13–15 minutes until the sides are golden brown and the inside is slightly underdone. Optional:
4
add chocolate chips and flaky sea salt to the cookies.Transfer the cookies to a cooling rack after 5 minutes on the heated pan.
5