Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone baking mat.
In a large mixing bowl, cream together the softened butter, brown sugar, and granulated sugar using an electric mixer or hand whisk until light, creamy, and fluffy, about 2 to 3 minutes.
Add the eggs one at a time, beating well after each addition. Then mix in the vanilla extract.
In a separate bowl, whisk together the all-purpose flour, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, stirring gently until just combined. Avoid overmixing.
Fold in the dark chocolate chips evenly throughout the dough.
Using a spoon or cookie scoop, drop rounded tablespoons of dough onto the prepared baking sheet, spacing about 2 inches apart.
Bake for 10 to 12 minutes, until edges are golden and centers look slightly soft. Do not overbake.
Allow cookies to cool on the baking sheet for 5 minutes before transferring to a cooling rack to set properly.