Begin by softening the butter to room temperature. Preheat your oven to 350°F (175°C) and line your baking sheets with parchment paper or a silicone mat.
In a large mixing bowl, combine the softened butter, brown sugar, and granulated sugar. Use an electric mixer on medium speed to beat them together until the mixture is light and fluffy, about 2 to 3 minutes.
Beat in the eggs one at a time, ensuring each is fully incorporated before adding the next. Then, add the vanilla extract and mix until combined.
In a separate bowl, whisk together the all-purpose flour, baking soda, and salt. Gradually add the dry ingredients to the wet mixture, stirring on low speed or folding gently with a spatula until just combined.
Gently fold in the dark chocolate chips, ensuring they are evenly distributed throughout the dough.
Use a cookie scoop or spoon to drop rounded tablespoons of dough onto your baking sheets, spacing them about 2 inches apart. Bake for 10 to 12 minutes, or until the edges are golden but the centers still look slightly soft.
Remove the cookies from the oven and let them cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.