Preheat oven to 350°F (175°C) and line an 8×8-inch pan with parchment paper
Melt butter and allow it to cool slightly
Whisk melted butter, brown sugar, and granulated sugar until smooth and glossy
Add eggs one at a time, mixing well after each addition
Stir in vanilla extract
Fold in flour and salt just until combined
Gently mix in chocolate chips
Spread batter evenly into prepared pan
Bake for 30–35 minutes until edges are set and center is slightly soft
Cool completely before slicing
Notes
Do not overmix after adding flour to keep blondies chewySlight underbaking ensures soft centersUse more brown sugar than white sugar for classic blondie flavorLet blondies cool fully for clean slicesOptional flaky sea salt on top enhances flavor