Heat oven to 375 degrees F. Place oven rack in the middle position of the oven.
Line 2 cookie sheets with silpat or parchment paper.
In a bowl whisk flour and baking soda together.
In a large skillet, heat 10 Tablespoons butter over medium high heat, swirling pan until butter turns a golden brown and has a nutty aroma. Remove from heat, pour melted butter into a large mixing bowl and add the remaining 4 Tablespoons butter, whisking until butter melts.
Whisk in both sugars, vanilla, and salt into bowl, mixing until fully incorporated. Add whole egg and egg yolk to sugar and butter mixture, whisking until smooth and shiny. Let the mixture rest 3 minutes. Repeat this step, whisking and resting twice, until it's smooth, shiny and thick.
Add flour mixture and incorporate with a rubber spatula, just until combined.
Fold in white chocolate chips and macadamia nuts until everything is combined and no flour pockets remain.
Use a cookie scoop, or weigh dough into 16 equal portions. (About 3 Tablespoons)
Place dough balls onto prepared cookie sheets, about 2 inches apart, 8 to a cookie sheet.
Bake trays one at a time for 10 to 14 minutes rotating trays halfway. Cool a few minutes and then transfer to a rack to finish cooling.