Preheat your oven to 350°F (175°C). Lightly grease a 9×9-inch baking pan or line it with parchment paper. Set aside.
Prepare the Lemon Sugar:
In a medium bowl, combine the granulated sugar and lemon zest. Rub the zest into the sugar with your fingers to release the lemon oils, enhancing the flavor.
Mix the Wet Ingredients:
Stir the melted butter into the lemon sugar until well combined. Add the eggs, egg yolk, lemon juice, and vanilla extract, stirring just until everything is incorporated.
Combine Dry Ingredients:
Add the flour and salt to the wet mixture and stir until almost combined. Fold in the white chocolate chips, mixing just until combined.
Bake:
Spread the batter evenly into the prepared baking pan. Bake for 25-27 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs or clean.
Cool and Glaze:
Allow the brownies to cool completely in the pan. For the glaze, whisk together the confectioners’ sugar and lemon juice until smooth. Spread the glaze over the cooled brownies.
Serve:
Once the glaze has set, cut the brownies into squares and enjoy!
