If you’re hunting for the perfect ooey-gooey chocolate chip cookie bars, the hunt ends with this recipe. In a 9” x 13” pan, you can make the tastiest cookie bars full of chocolate, brown butter, and the perfect touch of flakey sea salt.
Heat oven to 350°F (175°C). Prepare a 9 x 13 inch (23 cm x 33 cm) metal baking pan by lining with parchment paper and leaving a slight overhang on the sides.
Heat butter in a saucepan over medium-low heat, stirring continuously until there are golden brown flecks at the bottom of the saucepan and you smell a nutty aroma, about 3 - 5 minutes. Be sure to watch the butter throughout the entire browning process to ensure the butter does not burn.
Beat cooled brown butter, granulated sugar, and brown sugar in the bowl of a stand mixer fitted with a paddle attachment until light and fluffy, about 3 minutes.
Bake for 26 - 30 minutes, until lightly browned on the top. Sprinkle cookie bars with Maldon sea salt flakes immediately after removed from the oven. Allow cookie bars to cool in the pan on a wire rack for at least 60 minutes. Remove cooled cookie bars from the pan and slice into 24 even squares.