Classic Chocolate Chip Cookie Bars

Bahan-bahan (16 porsi)

• 2 and 1/4 cups (281g) all-purpose flour (spooned & leveled)
• 1 teaspoon baking soda
• 1 and 1/2 teaspoons cornstarch
• 1/2 teaspoon salt
• 3/4 cup (12 Tbsp; 170g) unsalted butter, melted and slightly cooled
• 1 cup (200g) packed light brown sugar
• 1/3 cup (67g) granulated sugar
• 1 large egg plus 1 large egg yolk, at room temperature
• 2 teaspoons pure vanilla extract
• 1 cup (180g) semi-sweet chocolate chips
• optional: sprinkle of flaky sea salt