01 - Set oven temperature to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together all-purpose flour, baking soda, and salt.
03 - In a large bowl, whisk melted butter with light brown sugar and granulated sugar until well combined and slightly fluffy.
04 - Add one whole egg, one egg yolk, and vanilla extract to the butter-sugar mixture; whisk until smooth.
05 - Gradually fold the flour mixture into the wet ingredients using a spatula until just combined.
06 - Stir in semisweet chocolate chips until evenly distributed throughout the dough.
07 - Using a tablespoon or small ice cream scoop, portion the dough into cookies spaced approximately 2 inches apart on prepared baking sheets.
08 - Bake cookies for 10 to 12 minutes until edges are golden and centers remain soft.
09 - Allow cookies to cool on baking sheets for 5 minutes before transferring to wire racks to cool completely.