Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan or line it with parchment paper for easy removal.
In a large mixing bowl, combine the melted butter, brown sugar, and granulated sugar until well blended.
Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
In another bowl, whisk together the flour, baking powder, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Fold in the white chocolate chips and chopped macadamia nuts gently with a spatula, ensuring they are evenly distributed throughout the batter.
Pour the batter into the prepared baking pan, spreading it evenly.
Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs. Be careful not to overbake as this can dry out the blondies.
Allow the blondies to cool in the pan for about 10 minutes, then lift them out using the parchment paper (if used) and let them cool completely on a wire rack before cutting into squares.
Notes
Serve on a rustic wooden board, dusted with powdered sugar, and pair with milk or vanilla ice cream.
Keyword blondies, dessert, macadamia nuts, white chocolate