Preheat the oven to 350° and line a baking sheet with parchment paper.
In a small bowl, whisk together flour, corn starch and baking soda. Set aside.
2 cups (260g) gluten free flour, 1 teaspoon corn starch, 1 teaspoon baking soda
Add the sugars to the cooled brown butter and mix until nice and fluffy.
¾ cups (150g) light brown sugar, ½ cup (105g) granulated sugar
Mix in the eggs and vanilla. Whisk until fluffy.
2 large eggs, 1 tablespoon vanilla
Whisk in the salt. Allow the batter to rest for a minute or two and whisk again.
¾ teaspoon salt
Gently fold in the dry ingredients.
Mix in the chocolate chips.
1 ¼ cups chocolate chips
Scrape down the sides of the bowl and cover the finished dough with plastic wrap and transfer to the refrigerator for at least 30 minutes.
Scoop the dough using a medium cookie scoop, roll into balls and place on the prepared pan.
Bake cookies for 9-10 minutes. The edges will be golden brown and the middles should just start to brown lightly.
Immediately add extra chocolate chips to the top of each cookie. Sprinkle cookies with your favorite flaky sea salt if desired.
⅓ cup chocolate chips
Cool the cookies on the sheet pan for 5-6 minutes before transferring to a cooling rack to cool completely.
Cookies can be stored in an airtight container at room temperature for up to 3 days.