1. Brown the Butter: First, in a medium saucepan over medium heat, melt the butter. Continue cooking the butter, swirling the pan frequently, until the butter start to foams and turns brown (this happen quickly) about 5-8 minutes: Remove from heat and pour a large heatproof bowl to stop the cooking. Let cool for 15-20 minutes.
2. Mix Wet Ingredients: Once the butter is warm but and hot, add both the brown sugar and granulated sugar to the bowl. Mix vigorously for about 1 minute until fully combined and slightly glossy. Next, add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
3. Combine Dry Ingredients: In a separate bowl, whisk together the flour, baking soda, and fine sea salt.
4. Make The Dough: Gradually add the dry ingredients to the wet ingredients, folding with a spatula until just combined and no dry flour remains. Be careful not to over mix. Finally fold in the chocolate chips until evenly distracted.
5. The Crucial Chill: Cover the bowl tightly and refrigerate the dough for at least 24 hours, and up to 72 hours. This step is non-negotiable for optimal flavor and texture.
6. Bake: When ready to bake, remove dough from refrigerator and place on counter top, preheat the oven to 350℉ (175℃). Line baking sheet with parchment paper. Portion the dough into 3-tablespoon sized balls (about 60g), placing them 3-inches apart on the baking sheet. Sprinkle lightly with the flaky salt.
7. Bak To Perfection: Bake for 12-14 minutes, until the edges are set and golden brown but the center still look soft and slightly underdone. The cookies will seem too soft but will set perfectly as they cool.
8. Cool: Let the cookies cool on the baking sheet for 10 minutes before transferring them to a wire rack to cool completely. ( Or enjoy them warm!😊)