The Best Chewy Café-Style Chocolate Chip Cookies

Ingredients

• + 2 tablespoons all purpose flour
• teaspoon baking soda
• teaspoons cornstarch
• teaspoon salt*
• sticks butter, melted and cooled
• dark brown sugar, lightly packed*
• granulated sugar
• large eggs
• teaspoons vanilla extract
• dark chocolate chips, plus more for topping*