Nutella Chocolate Chip Cookies

Bahan-bahan (30 porsi)

• 1/2 cup (8 Tbsp; 113g) unsalted butter, softened to room temperature
• 3/4 cup (150g) packed light brown sugar
• 1/2 cup (100g) granulated sugar
• 1 large egg + 1 egg yolk, at room temperature
• 1 teaspoon pure vanilla extract
• 1/2 cup (148g) Nutella, divided*
• 2 and 1/3 cups (291g) all-purpose flour (spooned & leveled)
• 1 and 1/4 teaspoons baking soda
• 1 teaspoon cornstarch
• 1/2 teaspoon salt
• 1 and 1/4 cups (225g) semi-sweet chocolate chips, divided
• sea salt, to taste