01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking soda, and fine sea salt until evenly mixed.
03 - In a large bowl, beat the softened butter, granulated sugar, and brown sugar until light and creamy, about 2 minutes.
04 - Add eggs one at a time to the butter mixture, beating well after each addition. Mix in vanilla extract thoroughly.
05 - Gradually add the dry ingredients to the wet mixture, mixing on low speed until just combined to avoid overmixing.
06 - Gently fold in the dark chocolate chips and optional nuts with a spatula until evenly distributed.
07 - Use heaping tablespoons to scoop dough onto the prepared baking sheets, spacing each about 2 inches apart.
08 - Sprinkle each cookie with a pinch of flaky sea salt for contrast.
09 - Bake in the preheated oven for 11 to 13 minutes until edges are golden but centers remain soft.
10 - Allow cookies to cool on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely.