Ingredients
Method
- Brown the butter in a light-colored saucepan over medium heat, swirling until amber and nutty, about 5 to 7 minutes. Pour into a bowl, cool, then chill until firm but pliable, about 30 minutes.
- Whisk together the flour, cornstarch, baking soda, and salt in a medium bowl.
- Beat the chilled brown butter, brown sugar, and granulated sugar with an electric mixer on medium speed until fluffy, about 3 minutes.
- Add the egg, egg yolk, and vanilla, and beat until smooth and glossy, about 1 minute.
- On low speed, mix in the dry ingredients until just combined, then fold in the chocolate chips with a spatula.
- Scoop 3-tablespoon dough balls onto a parchment-lined sheet, spacing them apart. Chill for at least 30 minutes while the oven preheats to 350°F (175°C). Bake one sheet at a time for 10 to 12 minutes, until edges are golden and centers look set. Cool on the sheet for 5 minutes, then transfer to a rack.
Notes
Chill the dough for at least 30 minutes before baking; the flavor deepens if you let it rest overnight in the fridge. The cookies will look slightly underdone in the center when you pull them out, and they’ll finish setting as they cool.
