Salted Dark Chocolate Cookies

Bahan-bahan (20 porsi)

• 1/2 cup (8 Tbsp; 113g) unsalted butter, softened to room temperature
• 1/2 cup (100g) granulated sugar
• 1/2 cup (100g) packed light or dark brown sugar
• 1 large egg, at room temperature
• 1 teaspoon pure vanilla extract
• 1 cup (125g) all-purpose flour (spooned & leveled)
• 1/3 cup (27g) natural unsweetened cocoa powder*
• 1/3 cup (27g) Hershey’s special dark cocoa powder*
• 1 teaspoon baking soda
• 1/8 teaspoon salt
• 1 Tablespoon (15ml) milk
• 1 cup (180g) semi-sweet or dark chocolate chunks and/or chips, plus a few more for topping*
• sea salt for sprinkling