Preheat the oven to 350°F (175°C).
In the bowl of a stand mixer or using an electric hand mixer, cream together the butter, brown sugar, and granulated sugar until light and fluffy.
Scrape the sides of the bowl, then add the egg and vanilla extract. Mix until well combined.
Add the flour, baking soda, and salt. Mix until a soft but not sticky dough forms.
Fold in the chocolate chips.
Scoop the dough into 1 ½ tablespoon portions (a #40 cookie scoop works well) and place them on a cookie sheet lined with parchment paper, a silicone mat, or an ungreased baking sheet.
Bake for 8-10 minutes, or until the cookies have spread and the edges are just starting to turn golden brown.
Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.