Cookie Dough:

• 1 cup (227 grams) unsalted butter, at room temperature
• 1 cup creamy peanut butter, at room temperature
• 2 teaspoons pure vanilla extract
• 1 and 1/2 cups dark brown sugar, packed
• 1/2 cup granulated sugar
• 2 large eggs, at room temperature
• 1 large egg yolk, at room temperature
• 2 and 1/2 cups (300 grams) all-purpose flour
• 1 teaspoon baking soda
• 1 and 1/2 teaspoons baking powder
• 1/2 teaspoon salt

Additional Mix-Ins and Toppings:

• 1 and 1/2 cups holiday M&Ms, plus extras for decorating
• 1 cup semi-sweet or milk chocolate chips, plus extras for decorating
• 1 teaspoon granulated sugar, for sprinkling