Step 1: Prepare Your Baking Pan

Preheat your oven to 350°F (175°C). Lightly coat a 9×13-inch baking pan with nonstick cooking spray. Line the pan with parchment paper, leaving an overhang on the sides to make it easy to lift out the blondies once they’re baked.

Step 2: Mix the Dry Ingredients

In a medium bowl, whisk together the flour, baking powder, and salt. This ensures the baking powder is evenly distributed throughout the flour, helping your blondies rise evenly.

Step 3: Combine the Wet Ingredients

In a large bowl, stir together the melted butter, brown sugar, and granulated sugar until the mixture is smooth and well-combined. Add the beaten eggs and vanilla extract, mixing just until incorporated.

Step 4: Mix the Batter

Gradually add the dry ingredients to the wet ingredients, mixing gently after each addition. Be careful not to overmix – stir just until the flour is incorporated to keep the blondies tender.

Step 5: Fold in the Extras

Fold in 1 cup of white chocolate chips and nuts (if using). This step adds a delightful texture and flavor to the blondies. The white chocolate chips give a creamy sweetness, while the nuts provide a satisfying crunch.

Step 6: Transfer and Top the Batter

Spoon the batter into the prepared pan, spreading it out evenly. Sprinkle the remaining white chocolate chips on top for extra sweetness and a nice visual appeal.

Step 7: Bake to Perfection

Bake in the preheated oven for 23-27 minutes or until the edges are lightly browned and start to pull away from the sides of the pan. A toothpick inserted into the center should come out mostly clean, with a few moist crumbs. Avoid overbaking to keep the blondies chewy and soft.

Step 8: Cool and Slice

Allow the blondies to cool completely in the pan before slicing. This helps them set and makes cutting clean, neat squares easier.