01 -
Preheat the oven to 350°F. Line a 9×13-inch metal baking pan with parchment paper, leaving some overhang for easy removal. Grease the paper lightly.
02 -
In a medium bowl, whisk together the flour, baking powder, and salt until well combined.
03 -
In a large bowl, whisk the brown sugar, granulated sugar, and melted butter until smooth and well blended. Add vanilla and eggs, whisking until fully incorporated.
04 -
Using a rubber spatula or wooden spoon, gently fold the dry ingredients into the wet mixture until just a few flour streaks remain. Fold in 2 cups of chocolate chips until evenly distributed, being careful not to overmix.
05 -
Spread the cookie dough evenly in the prepared pan. Sprinkle remaining chocolate chips on top, gently pressing them into the surface.
06 -
Bake for 18-25 minutes, until edges are light golden brown and center is slightly puffed. Sprinkle with flaky sea salt while still hot from the oven.
07 -
Let bars cool in the pan for about 45 minutes at room temperature (or refrigerate to speed up cooling). Once barely warm, lift out using parchment overhang and slice into squares or rectangles.