Preheat the oven

• Preheat the oven to 180 °C.
• Line a baking sheet with parchment paper.

Brown the butter

• Melt the butter in a saucepan over medium heat.
• Cook, stirring occasionally, until deep amber and nutty, about 5 to 7 minutes.
• Remove from the heat and let cool.

Combine the dry ingredients

• Whisk together the flour, baking soda and salt in a medium bowl.
• Set aside.

Make the wet batter

• Combine the cooled brown butter, brown sugar and granulated sugar in a large bowl.
• Whisk for 1 to 2 minutes until a smooth paste forms.
• Crack in the egg and add the vanilla extract, then mix until well combined, about 2 to 3 minutes.

Form the dough

• Fold the dry ingredients into the wet batter until just combined.
• Stir in the chocolate chips.

Scoop the cookies

• Scoop 4 cookies onto the prepared baking sheet, leaving space between each.
• Top with additional chocolate chips if desired.

Bake

• Bake for 12 minutes, until golden and crispy at the edges and gooey at the center.

Cool

• Let the cookies cool completely on the baking sheet.
• Transfer to a wire rack to cool further.