Preheat the Oven: Set the oven to 350°F (175°C).
Cream the Butter and Sugars: In a stand mixer or using an electric hand mixer, beat the butter, brown sugar, and granulated sugar until light and fluffy.
Add the Egg and Vanilla: Scrape down the sides of the bowl, then mix in the egg and vanilla extract until well combined.
Mix the Dry Ingredients: Add the flour, baking soda, and salt. Mix until a soft but not sticky dough forms.
Fold in the Chocolate Chips: Gently mix in the chocolate chips until evenly distributed.
Portion the Dough: Scoop the dough into 1 ½ tablespoon portions (a #40 cookie scoop works well) and place them on a baking sheet lined with parchment paper or a silicone mat.
Bake: Bake for 8-10 minutes, or until the edges are just starting to turn golden brown.
Cool: Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.