Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper or silicone baking mats.
In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until the mixture is light and fluffy. This usually takes about 3-4 minutes with an electric mixer on medium speed.
Add the eggs one at a time, beating well after each addition. Stir 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 ingredients, mixing on low speed or folding in with a spatula until just combined. Avoid overmixing to keep your cookies tender.
Fold in the dark chocolate chips evenly throughout the dough.
Using a cookie scoop or tablespoon, drop dough balls onto the prepared baking sheets, spaced about 2 inches apart.
Bake for 10-12 minutes or until the edges are golden but the centers still look slightly soft. The cookies will firm up as they cool.
Remove from the oven and allow the cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.