Step 1: Preheat Oven : Preheat oven to 350°F (175°C). Line baking sheets with parchment paper or silicone baking mats.

Step 2: Mix Dry Ingredients : In a medium bowl, whisk together flour, baking soda, and salt. Set aside.

Step 3: Mix Wet Ingredients : In a large bowl, combine melted butter, brown sugar, and granulated sugar. Mix until smooth and slightly fluffy. Beat in eggs and vanilla extract until fully incorporated.

Step 4: Combine Wet and Dry Ingredients : Gradually add the dry ingredients to the wet ingredients, mixing just until combined. Fold in chocolate chunks gently.

Step 5: Scoop and Bake : Using a cookie scoop or tablespoon, drop dough onto prepared baking sheets, leaving about 2 inches between cookies. Sprinkle each cookie with a small pinch of flaky sea salt. Bake for 12–15 minutes until edges are lightly golden but centers remain soft.

Step 6: Cool : Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.