In a medium saucepan, melt butter over medium heat, stirring constantly, until it foams and turns golden brown with a nutty aroma; remove from heat and let cool for 10 minutes.
In a large bowl, whisk together granulated sugar, brown sugar, egg, and vanilla extract until smooth.
Stir the browned butter into the sugar mixture until combined.
In another bowl, whisk together the flour, baking soda, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Fold in the chocolate chips evenly into the dough.
Drop dough by rounded tablespoons onto a parchment-lined baking sheet, spacing about 2 inches apart.
Bake in a preheated oven at 350°F (175°C) for 10 to 12 minutes until edges are golden and centers are set.
Remove from oven and let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
Notes
For extra chewiness, chill the dough for at least 30 minutes before baking.