Salty Chocolate Chunk Cookies

I found this recipe on Epicurious and absolutely had to try them.  Whoever thought to put dark chocolate and salt together was an absolute genius, I will eat anything with the combo!  These cookies have the perfect amount of salt, not overwhelming but just enough to let you know it's there.  Of course, you can always sprinkle on as much/little of the salt as you prefer.

1 1/2 cups all-purpose flour
1 teaspoon baking powder
1/2 teaspoon kosher salt
1/4 teaspoon baking soda
1/2 cup (1 stick) unsalted butter, room temperature
3/4 cup (packed) light brown sugar
1/2 cup sugar
1/4 cup powdered sugar
2 large egg yolks
1 large egg
1 teaspoon vanilla extract
8 ounces semisweet or bittersweet chocolate (do not exceed 72% cacao), coarsely chopped
Maldon or other flaky sea salt

Place racks in upper and lower thirds of oven and preheat to 375°F. Whisk flour, baking powder, kosher salt, and baking soda in a medium bowl; set aside.

Using an electric mixer on medium speed, beat butter, brown sugar, sugar, and powdered sugar until light and fluffy, 3-4 minutes. Add egg yolks, egg, and vanilla. Beat, occasionally scraping down the sides of the bowl, until mixture is pale and fluffy, 4-5 minutes. Reduce mixer speed to low; slowly add dry ingredients, mixing just to blend. Using a spatula, fold in chocolate.

Spoon rounded tablespoonfuls of cookie dough onto 2 parchment paper-lined baking sheets, spacing 1" apart. Sprinkle cookies with sea salt.

Bake cookies, rotating sheets halfway through, until just golden brown around the edges, 10-12 minutes (the cookies will firm up as they cool). Let cool slightly on baking sheets, then transfer to wire racks; let cool completely. DO AHEAD: Cookies can be made 1 day ahead. Store airtight at room temperature.