01 - Set oven temperature to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together all-purpose flour, baking soda, and fine sea salt until evenly mixed.
03 - Beat softened butter with granulated sugar and brown sugar until mixture is creamy and light in color, approximately 2 to 3 minutes.
04 - Add eggs one at a time to the butter-sugar mixture, mixing thoroughly after each addition. Stir in vanilla extract.
05 - Gradually add dry ingredients to the wet mixture, stirring just until fully combined without overmixing.
06 - Gently fold semisweet chocolate chips or chunks into the dough ensuring even distribution.
07 - Drop heaping tablespoons of dough onto prepared baking sheets, spacing each about 2 inches apart.
08 - Sprinkle 1 to 2 teaspoons of flaky sea salt evenly over the dough mounds before baking.
09 - Bake in the preheated oven for 10 to 12 minutes, or until edges turn golden and centers appear set.
10 - Allow cookies to cool on baking sheets for 5 minutes before transferring to wire racks to cool completely.