White Chocolate Macadamia Nut Blondies

0 Preheat your oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment paper, leaving some overhang for easy removal. Lightly grease the parchment paper with non-stick cooking spray or butter.
1 In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
2 In a large mixing bowl, combine the melted butter, light brown sugar, and granulated sugar. Mix until well combined and smooth.
3 Add the egg and beat well. Stir in the vanilla extract.
4 Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix the batter.
5 Gently fold in the white chocolate chips and chopped macadamia nuts until evenly distributed throughout the dough.
6 Pour the dough into the prepared baking pan, using a spatula to spread it out evenly.
7 Bake in the preheated oven for 25-30 minutes, or until the edges are golden brown and a toothpick inserted into the center comes out clean or with just a few moist crumbs.
8 Allow the cookie bars to cool completely in the pan on a wire rack. Once cool, use the parchment paper overhang to lift the bars out of the pan and onto a cutting board.