Before you jump into the mixing, make sure you have everything at hand. Gather your flour, baking powder, salt, baking soda, walnuts, brown sugar, butter, egg, vanilla, chocolate chips, cinnamon, and sea salt. Having all your ingredients ready will make the process smooth and enjoyable.

Go ahead and preheat your oven to 350°F (180°C). Setting up the oven at this point ensures it’s hot and ready by the time you finish mixing, which is key for getting that perfect texture.

Take a 9x9-inch baking pan and grease it well with a little butter or cooking spray. You want to make sure those blondies release easily after baking.

In a medium bowl, whisk together the sifted flour, baking powder, salt, and baking soda. This simple step makes sure there are no lumps—trust me, it’s worth it! Stir in the chopped walnuts, which will add texture to your blondies, and set this bowl aside.

In a large mixing bowl, combine the packed brown sugar with the melted butter. Use a whisk to beat them together until well mixed and combined. Let this mixture cool slightly because you don’t want to scramble the egg in the next step.

Now, add your beaten egg and vanilla extract to the brown sugar and butter mixture. Stir it in thoroughly. The mixture should look glossy and uniform at this stage.

Take the dry flour mixture and add it to the wet mixture gradually, stirring just until everything is nicely combined. Aim for a batter that’s mixed but still slightly lumpy. This ensures your blondies have the right chewy texture.

Pour the batter into your prepared pan, spreading it evenly. A spatula will help you smooth the top. Don’t forget to sprinkle those chocolate chips generously over the top for that extra goodness.

Place the pan in your preheated oven and set your timer for 20 to 25 minutes. The blondies are done when the top is lightly golden and a toothpick inserted in the center comes out clean or with just a few moist crumbs attached.