1-Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper to prevent sticking.

2-Brown the butter in a pan over medium heat, stirring constantly until it foams and turns golden brown; let it cool slightly before moving on.

3-In a small bowl, mix the cooled browned butter with the packed brown sugar and granulated sugar until well combined.

4-Add the egg yolk and vanilla extract to the mixture, stirring until smooth and creamy.

5-Incorporate the all-purpose flour, baking soda, and salt, mixing just until no flour streaks remain be careful not to overmix.

6-Gently fold in the chocolate chips to distribute them evenly without breaking them up.

7-Shape the dough into either 2 large cookies or 4 smaller ones and place them on the prepared baking sheet.

8-Bake for about 11 minutes, until the edges are golden and the centers are puffy but still slightly gooey.

9-Let the cookies cool on the sheet before enjoying to allow the texture to set perfectly.