1. Cream butter and sugar together until light and fluffy.
2. Mix in eggs, eggnog, and vanilla extract until well combined.
3. In a separate bowl, whisk together flour, baking powder, salt, cinnamon, and nutmeg.
4. Gradually add the dry ingredients to the wet ingredients, mixing until a soft dough forms.
5. Cover and chill the dough in the refrigerator for at least 30 minutes.
6. Preheat oven to 350°F and line a baking sheet with parchment paper.
7. Scoop dough and roll into small balls, optionally coating in cinnamon sugar.
8. Place dough balls on the prepared baking sheet, spacing them apart.
9. Bake for 10-12 minutes or until edges are lightly golden.
10. Allow cookies to cool on the baking sheet for a few minutes, then transfer to a wire rack.
11. Prepare an eggnog glaze or cream cheese frosting with cinnamon.
12. Once cookies are completely cool, drizzle or spread the topping over them.
13. Let the glaze or frosting set before serving or storing.
14. Store cookies in an airtight container at room temperature for 3-5 days.
15. Enjoy with a glass of eggnog or hot chocolate for a festive holiday treat.