Preheat oven to 350°F and line two baking sheets with parchment paper.
Whisk together flour, baking soda, and salt in a medium bowl and set aside.
In a large bowl, beat softened butter with both sugars until light and fluffy, about 3 minutes.
Add eggs one at a time, beating well after each addition, then mix in vanilla extract.
Gradually stir in the flour mixture until just combined, being careful not to overmix.
Fold in the hand-chopped chocolate chunks, reserving a handful to press into the tops of cookies before baking.
Scoop dough into 2-tablespoon portions and place 2 inches apart on prepared baking sheets.
Press a few extra chocolate chunks onto the top of each dough ball for maximum chocolate pools.
Bake for 11-13 minutes until edges are golden but centers still look slightly underdone.
Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack.