Start by preheating your oven to 350°F. This step is crucial for ensuring that your Blondies bake evenly. While the oven heats, prepare your baking pan. Brush an 8×8-inch square baking pan with a bit of melted butter, ensuring that every corner is covered to prevent sticking.
Line the pan with parchment paper, leaving a 2-inch overhang on two sides. This clever trick will make it easy to lift your Blondies out of the pan once baked, making cutting them into squares a breeze.
In a large mixing bowl, combine the melted butter and both types of sugar: brown sugar and granulated sugar. Use a whisk to blend them together until the mixture is smooth and creamy. You should see a lovely glossy texture forming.
Add the egg and vanilla extract into the bowl. Whisk these in until they are fully incorporated, and the mixture is light and fluffy. This step is essential for incorporating air, which helps achieve that lovely chewy texture.
Next, add the flour and salt to the mixture. Stir gently with a spatula until just combined. Be careful not to overmix; the batter should be slightly lumpy and not too smooth.
Fold in ½ cup of the chocolate chips using a spatula or wooden spoon. This will create delicious pockets of melty chocolate throughout your Blondies. Save the remaining chips for the topping!
Transfer the batter into your prepared baking pan, smoothing the top with a rubber spatula. Make sure it’s evenly spread out, reaching all corners of the pan.
Sprinkle the rest of the chocolate chips on top, pressing them gently into the batter to ensure they stick during baking.
Bake in the preheated oven for about 30 minutes. You’ll know they’re done when the top is golden brown and a toothpick inserted into the center comes out clean.
Once baked, remove the pan from the oven and set it on a wire rack to cool completely. This will allow the Blondies to firm up and make cutting easier. Using the overhanging parchment, lift them out of the pan and transfer to a cutting board. Cut into squares and enjoy!
