Sift the all purpose flour, baking soda, baking powder, and salt in a bowl.
Whisk the dry ingredients together and set the bowl aside.
Melt the unsalted butter in a saucepan on medium heat.
Swirl the melted butter in the saucepan and stir occasionally.
Once the butter turns into a golden brown color, remove the saucepan from the heat and transfer to a heatproof bowl to cool.
Add both sugars to the bowl of butter and whisk until it is all incorporated.
Add vanilla and eggs to the butter-sugar mixture until it is smooth.
Fold the dry ingredients until there are no dry flour bits left.
Fold in the nuts and white chocolate.
Let the white cholate macadamia cookie dough rest in the refrigerator for at least one hour.