Ingredients:
- 1 cup (226g) unsalted butter
- 1 1/4 cups (250g) dark brown sugar, packed
- 1/2 cup (100g) granulated white sugar
- 1 large egg, room temperature
- 1 large egg yolk, room temperature
- 1 tablespoon (15ml) pure vanilla extract
- 2 1/4 cups (280g) all-purpose flour
- 2 teaspoons (6g) cornstarch
- 1 teaspoon (5g) baking soda
- 3/4 teaspoon (4g) sea salt
- 1 1/2 cups (255g) semi-sweet chocolate chunks
- 1 pinch flaky sea salt for finishing
Instructions:
- Place the 1 cup of unsalted butter in a saucepan over medium heat, whisking constantly until it turns a deep amber and smells nutty. Note: This takes about 5-8 minutes; watch for the sizzle to stop.
- Pour the browned butter into a large mixing bowl and let it sit for 10 minutes. Note: Adding eggs to hot butter will scramble them, which we definitely don't want.
- Add the 1 1/4 cups dark brown sugar and 1/2 cup white sugar to the cooled butter. Whisk vigorously for 2 minutes until the mixture looks like wet sand.
- Add the 1 large egg, 1 egg yolk, and 1 tablespoon vanilla. Beat the mixture for another 3 minutes until it becomes pale, thick, and velvety.
- In a separate bowl, sift together the 2 1/4 cups flour, 2 teaspoons cornstarch, 1 teaspoon baking soda, and 3/4 teaspoon sea salt.
- Slowly fold the dry ingredients into the wet mixture using a spatula until just a few streaks of flour remain. Note: Over mixing here leads to tough, bready cookies.
- Gently stir in the 1 1/2 cups semi sweet chocolate chunks until evenly distributed through the thick dough.
- Cover the bowl and refrigerate for at least 30 minutes. Note: This hydrates the flour and prevents the cookies from spreading into flat pancakes.
- Preheat your oven to 350°F (175°C). Scoop 2 tablespoon sized balls onto a parchment lined sheet, spaced 2 inches apart.
- Bake for 9-11 minutes until the edges are set and lightly tawny, but the centers still look slightly underdone.
- Remove from the oven and immediately sprinkle with flaky sea salt. Let them rest on the pan for 10 minutes until they firm up enough to move.