01 - Set oven temperature to 350°F and line two baking sheets with parchment paper.
02 - Whisk together flour, baking soda, and sea salt in a medium bowl; set aside.
03 - In a large bowl, beat softened butter with granulated and brown sugars until light and fluffy, approximately 2 to 3 minutes.
04 - Add eggs one at a time to the butter-sugar mixture, beating well after each addition, then mix in vanilla extract.
05 - Gradually add dry ingredient blend to the wet mixture, mixing until just combined to avoid overworking the dough.
06 - Fold semisweet chocolate chunks into the dough using a spatula.
07 - Drop rounded tablespoons of dough onto prepared baking sheets, spacing each about 2 inches apart.
08 - Bake for 10 to 12 minutes until cookie edges turn golden while centers remain soft.
09 - Let cookies cool on baking sheets for 5 minutes before transferring to wire racks to cool completely.