Cookie Dough

• 1 1/2 sticks (3/4 cup) salted butter, at room temperature
• 3/4 cup packed brown sugar
• 1 egg, at room temperature
• 2 tablespoons bourbon (optional)
• 2 teaspoons vanilla extract
• 2 cups all-purpose flour, plus an additional 2-4 tablespoons if needed
• 1/2 teaspoon cinnamon
• 1/4 teaspoon grated nutmeg
• 1/2 teaspoon baking soda
• 1/2 teaspoon kosher salt

Spiced Vanilla Icing

• 2 cups powdered sugar
• 1 tablespoon vanilla extract
• 1/4 teaspoon grated nutmeg or cinnamon
• 1/2 cup eggnog (or use milk or water)
• Edible gold dust, vanilla sugar, and/or sprinkles for decorating