01 -
Whisk together all-purpose flour, baking soda, cornstarch, and salt in a medium bowl and set aside.
02 -
Melt the unsalted butter in a pan over medium heat while gently swirling. Continue to cook until the foaming stops and the butter becomes a warm brown color with a nutty aroma. Transfer to a heat-safe bowl and allow to cool.
03 -
Beat the cooled brown butter with light brown sugar and granulated sugar in a large bowl using a hand mixer for about one minute. Add eggs and vanilla extract, mixing just until combined.
04 -
Cover the bowl and refrigerate the dough for 30 to 60 minutes until it is cold to the touch.
05 -
Preheat oven to 325°F and position racks in the center. Line a baking sheet with parchment paper.
06 -
Roll the chilled dough into balls about the size of a ping-pong ball and arrange on the prepared baking sheet with adequate space between each.
07 -
Bake each batch until the edges are golden and centers are just set. Repeat until all dough is used.