Step 1: Brown the Butter

1. Melt the butter in a saucepan over medium heat. Stir continuously until the butter foams and turns golden brown with a nutty aroma, about 5-7 minutes.
2. Remove from heat, pour the browned butter into a bowl, and let it cool for 10 minutes.

Step 2: Mix the Wet Ingredients

1. In a large bowl, combine the browned butter, brown sugar, and granulated sugar. Beat until smooth and well combined.
2. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

Step 3: Combine the Dry Ingredients

1. In a separate bowl, whisk together the flour, baking soda, and salt.
2. Gradually mix the dry ingredients into the wet ingredients until well combined.
3. Gently fold in the semi-sweet chocolate chips.

Step 4: Chill the Dough

1. Cover the dough and refrigerate for at least 1 hour (or up to 24 hours for enhanced flavor).

Step 5: Bake the Cookies

1. Preheat the oven to 350°F (175°C) and line baking sheets with parchment paper.
2. Scoop the dough into 2-tablespoon-sized balls and place them about 2 inches apart on the prepared baking sheets.
3. Bake for 10-12 minutes, or until the edges are golden and the centers are slightly underbaked.

Step 6: Cool and Serve

1. Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.