Preheat your oven to 375°F (190°C) and line your baking sheets with parchment paper.

In a medium saucepan over medium heat, melt the salted butter until it turns a rich brown color, about 5–7 minutes.

In a mixing bowl, whisk together the flour, baking soda, and kosher salt.

In a large bowl, beat the cooled brown butter with dark brown sugar and granulated sugar until light and fluffy.

Slowly add the dry ingredients to the wet mixture, mixing until just combined, then fold in the white chocolate chips and macadamia nuts.

Form large balls of cookie dough and place them on the prepared baking sheets, leaving space between each.

Bake for 11–14 minutes, until edges are golden brown and centers are soft.

Cool on the baking sheet for about 5 minutes before transferring to a wire rack.