In a stand mixer fitted with a paddle attachment or handheld mixer, cream the butter on high for 1 minute. Mix until just combined to avoid overmixing.
In a large bowl using a hand mixer (or in the bowl of a stand mixer), cream cold butter on low speed until cubes lose half.
Levain bakery cookie recipe delish. Stir in chocolate chips and walnuts. Stir in flours, cornstarch, baking soda, and salt. In a large mixing bowl, cream together cold cubed butter, brown sugar, and sugar for 4 minutes or until creamy.
In a bowl, add the flour, baking powder, baking soda, and salt. Line a sheet pan or cookie sheet with a silicone baking mat or parchment paper. Add eggs, one at a time, mixing well after each one.
Everything from 9 to 26 minutes. Broma, beb, jw, and mh use more brown than white sugar. Line two large baking sheets with parchment paper.
Each recipe uses a combo of white and light brown sugar. In a medium bowl, whisk together flours, baking powder, baking soda, and kosher salt. Delish, cj, and bravetart (close enough) use a 1:1 white to light brown sugar combo—bravetart recommends toasted white sugar which i did.