Preheat the oven: Start by preheating your oven to 350°F (175°C). Grease a 9x9-inch baking pan or line it with parchment paper for easy removal.

Melt the butter: In a microwave-safe bowl, melt the unsalted butter in the microwave or on the stovetop. Allow it to cool slightly before moving to the next step.

Mix the sugars: In a large mixing bowl, combine the melted butter, brown sugar, and granulated sugar. Whisk together until smooth and well combined.

Add the eggs and vanilla: Crack the eggs into the sugar mixture, one at a time, and whisk until fully incorporated. Stir in the vanilla extract.

Combine the dry ingredients: In a separate bowl, whisk together the flour, baking powder, and salt. Gradually add the dry ingredients to the wet mixture, stirring just until combined. Be careful not to overmix, as this can affect the texture.

Fold in the white chocolate: Gently fold in the white chocolate chips using a spatula. Make sure they are evenly distributed throughout the batter.

Bake: Pour the batter into your prepared baking pan and spread it out evenly. Bake for 25-30 minutes or until a toothpick inserted into the center comes out with a few moist crumbs (not wet batter).

Cool and slice: Allow the brownies to cool completely in the pan on a wire rack. Once cooled, slice them into squares and enjoy the soft, chewy goodness.