Brown butter: Melt 1 stick of butter (save the other stick) in a pan over medium-heat. Cook for about 3-5 minutes, swirling the pan every so often. Allow the butter to brown (when it turns an amber golden color and has a nutty aroma, it’s done). Remove from the heat and then pour into a microwave-safe bowl and allow to cool.
Combine: In a large bowl, combine the remaining 1/2 cup softened butter, 3/4 cup brown sugar and 3/4 cup sugar. Mix for 1 minute, until smooth and creamy. Then add in the melted brown butter and stir until combined. Mix in 2/3 cup discard, 2 egg yolks and 2 teaspoons vanilla.
Mix dough: Add the 2 3/4 cups flour, 1 teaspoon salt, 1 teaspoon baking soda and 1 teaspoon baking powder. Mix until combined. Stir in 1-2 cups chocolate chips. Chill dough atleast 30 minutes (or longer if desired).
Preheat: Preheat oven to 350°F. Line two baking sheets with a baking mat or parchment paper and set aside.
Bake: Scoop cookie dough onto the prepared pan, about 2 inches apart. Bake for 7-9 minutes, or just until the edges are golden brown, while the center is still soft.
Cool: Remove from oven and allow the cookies to cool for a few minutes on the pan. Add a few extra chocolate chips on top of the cookies and sprinkle with flaked salt if desired. Then move to a cooling rack.
Notes
Brown butter: Learn how to make brown butter with these easy steps. Use a lighter colored pan to brown the butter, so that you can easily see the color change.Make ahead: Make the dough and refrigerate up to 24 hours. You can also freeze individual dough balls up to 3 months. Storage: Store baked cookies in a covered container up to 3 days or freeze up to 3 months.