Chocolate Chocolate Chip Cookies (Double Chocolate Chip Cookies)

Bahan-bahan (20 porsi)

• 1 cup (2 sticks) butter, softened to room temperature
• 3/4 cup granulated sugar
• 3/4 cup brown sugar, packed
• 2 eggs
• 2 teaspoons vanilla extract
• 2 cups all-purpose flour
• 2/3 cup unsweetened cocoa powder (or dark chocolate cocoa powder)
• 3/4 teaspoon baking soda
• 1/2 teaspoon salt
• 2 cups semi-sweet or dark chocolate chips