For the cookie dough: – 1 cup unsalted butter , melted and slightly cooled – 1 cup granulated sugar – ½ cup light brown sugar – 1 egg yolk – 2 teaspoons pure vanilla extract – ½ cup pumpkin puree – 3 cups flour (make sure to fluff your flour before measuring) – 1 teaspoon baking soda – 1 teaspoon cream of tartar – ½ teaspoon salt – ½ teaspoon ground ginger – ½ teaspoon ground cinnamon – ¼ teaspoon allspice – ¼ teaspoon ground nutmeg For the coating: – ½ cups granulated sugar – 1 teaspoon ground cinnamon – ½ teaspoon ground ginger – Dash of allspice