Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper.
Beat butter, granulated sugar, and brown sugar on medium speed for 3 minutes, until light and fluffy. Scrape the bowl.
Add vanilla and the egg. Beat for 2 minutes, until the mixture looks creamy and smooth.Scrape the bowl again.
Add flour, salt, and baking soda. Mix on low until everything is just combined. Stir in the chocolate chips.
Cover the bowl tightly with plastic wrap and refrigerate for 2 hours, or until firm. Don’t skip this — it prevents the cookies from flattening.
Use a real ice cream scoop to form your cookie dough. Pack the dough firmly into the scoop and place on the tray. Space 2 inches apart.
Bake for 11–13 minutes, until the edges are golden and the centers look pale and soft. Let cool for a few minutes on the sheet