Brown the butter: For a detailed tutorial, see this post on how to brown butter. Pour the butter in a large mixing bowl and allow the butter to cool slightly, ~10-15 minutes. 1 cup unsalted butter
Whisk in the sugars: Add both sugars to the slightly cooled brown butter and whisk until incorporated. It will look sandy, just make sure all large brown sugar clumps are broken up.
1 ¼ cup light or dark brown sugar, ½ cup granulated sugar
Add eggs and vanilla: Whisk in the eggs, milk, and vanilla extract until smooth.
1 large egg, 1 large egg yolk, 1 tbsp. vanilla extract, 2 tbsp. whole milk
Fold in dry ingredients: Use a rubber spatula to fold in the dry ingredients until most of the flour is incorporated. (I just add them directly in, instead of whisking in a separate bowl)
2 ½ cups all purpose flour, 1 tsp. baking soda, ½ tsp. baking powder, 1 tsp. salt
Add chocolate chips: Fold in the chocolate chips. Careful not to over mix. YUM.
1 cup semi sweet chocolate chips
Brief chill: Pop the cookie dough in the fridge for just about 10-15 minutes. This brief rest period will allow the flour to hydrate the dough and help create a super soft and chewy cookie.
Prep and preheat: Meanwhile, preheat the oven to 350°F. Line two baking sheets with parchment paper.
Scoop and bake: Using a cookie scoop, scoop the cookies into about 1½ tbsp. sized balls and drop them about 2 inches apart on prepared baking sheets. Bake for just 8-10 minutes or until the edges are set, and the centers are still gooey. Underbaking is always key since the cookies will continue to cook as they cool on the baking sheet, so removing them from the oven underbaked a little is perfectly fine! PS: you can swirl a cup around the cookies when warm right out of the oven to make perfect circles.
Cool: After a few minutes on the baking sheet, carefully use a spatula to place on a wire cooling rack lined with parchment paper.
Chocolate time: Melt the chocolate wafers in a microwave-safe bowl in 30-second increments until melted completely. Use a spoon or butter knife to spread a layer of chocolate on the bottom of the cookies. Lay the cookies chocolate side facing up on the parchment paper and allow the chocolate to harden, it will take ~30 minutes. Garnish the top of cookies with flaky sea salt, if desired.
1, 10 oz. bag milk or dark chocolate melting wafers, Maldon flaky sea salt
Last step: Enjoy!!