Brown Butter Chocolate Sheet Pan Cookies 

0 In a saucepan over medium heat, melt the butter. Continue cooking, stirring frequently, until the butter turns golden brown and gives off a nutty aroma. Remove from heat and let it cool for about 10 minutes.
1 Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking pan or line it with parchment paper for easy removal.
2 In a large mixing bowl, whisk together the browned butter, dark brown sugar, and granulated sugar until well combined. Add the eggs, egg yolks, and vanilla extract, mixing until smooth.
3 In a separate bowl, whisk together the flour, cornstarch, baking soda, baking powder, and salt.
4 Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Fold in the chocolate chips and chocolate chunks.
5 Spread the cookie dough evenly into the prepared 9x13-inch pan. Bake for 22-25 minutes, or until the edges are golden brown and the center is just set.
6 Let the cookies cool in the pan for at least 20-30 minutes before slicing into bars. Enjoy warm or at room temperature!