Pre-heat oven to 350 F and line a baking sheet with parchment paper or a silicone baking mat (this helps them not melt during baking)
Brown the butter in a small saucepan until light brown in color and frothy. Make sure to swirl the pan often so it doesn’t burn. Allow to cool for 2 minutes.
Mix together the brown sugar, granulated sugar and brown butter until combined. Add in the egg and vanilla and mix for about 2 minutes until it becomes thick.
Combine the flour, baking soda and salt. Slowly add to the batter while running the mixer on low and mix until all combined. Add in the chocolate chips and mix until evenly incorporated.
Use a small ice cream scoop and place 12-15 balls of dough about 2 inches apart on the cookie sheet.
Bake at 350 for 8-10 minutes. Sprinkle with sea salt when you pull out of the oven. Transfer to a cooling rack right away to stop the cookies from continuing to bake.
