Perfect Chocolate Chip Cookies

Bahan-bahan (45 porsi)

• 1 cup melted unsalted butter (cooled at least 10 minutes, 226g)
• 1 ¼ cup brown sugar (packed, 250g)
• ½ cup granulated sugar (100g)
• 1 large egg (room temperature preferred)
• 1 egg yolk (room temperature preferred)
• 1 ½ teaspoon vanilla extract
• 2 ¾ cups all-purpose flour (350g)
• 2 teaspoons cornstarch
• 1 teaspoon baking soda
• ¾ teaspoon salt
• 1 ¾ cup semisweet chocolate chips (plus additional for tops, optional 300g + additional)