Rich Chocolate Fudge Cookies with Dark Chocolate - Recipes by Clare

Ingredients

• 1/2 cup unsalted butter.
• 1/2 cup brown sugar.
• 1/4 cup granulated sugar.
• 1 teaspoon vanilla extract.
• 1 large egg.
• 1 cup all-purpose flour.
• 1/2 teaspoon baking soda.
• 1/2 cup cocoa powder.
• 1 tablespoon whole milk.
• 2/3 cup dark chocolate chunks.
• Extra chocolate for topping.