Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.
In a large mixing bowl, beat the softened butter, brown sugar, and granulated sugar together until creamy and smooth, about 2-3 minutes.
Add the vanilla extract and egg to the butter mixture, mixing until well combined.
Gradually add the flour mixture to the wet ingredients, mixing until just incorporated.
Fold in the white chocolate chips and chopped macadamia nuts until evenly distributed throughout the dough.
Using a cookie scoop or tablespoon, drop rounded balls of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake in the preheated oven for 10-12 minutes, or until the edges are golden brown but the centers still look soft.
Remove from the oven and let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.
Notes
Serve the cookies on a decorative platter, possibly with a side of melted white chocolate for dipping. Garnish with whole macadamia nuts for an elegant touch.