1 ⅛cupssemisweet chocolate chunks or assorted chocolates, chopped
Instructions
In the bowl of a stand mixer using the whisk attachment, beat the butter, sugar, and both of the brown sugars for 3 entire minutes. Do not skip this step or shorten the beating time.
Add the egg and the vanilla and beat for another 2 minutes, stopping once or twice to scrape the sides of the bowl.
Add baking soda, baking powder, salt, and beat until thoroughly mixed, then add the flour and stir to make a soft and thick dough.
Add chocolate pieces and mix until well distributed.
Cover the bowl and chill overnight OR scoop out 18 cookie dough balls using a medium size cookie scoop. Put the balls on a plate, cover and chill until ready to bake. Preferably overnight, but after a few hours or even immediately should be fine.
When you’re ready to bake, preheat oven to 360°F (182°C).
If you did not scoop up balls of dough, use your hands and a scraper to scoop out blogs of dough balls.
Arrange on baking sheets spacing 2 ½ inches apart.
Sprinkle some sea salt over them before they go in the oven.
At about the 10 to 12 minute mark, remove tray from heat and slam the tray down lightly on the counter a few times to flatten the cookies out. This also helps keeps the centers chewy. Return to the oven and bake for an additional 2 minutes.
Transfer cookies to a room-temperature, nonporous surface to cool for at least 3–5 minutes before serving.