Pre-heat oven to 350°F (180°C). In a bowl, combine dry ingredients. Whisk together flour, baking powder, salt, cinnamon and nutmeg for 30 seconds and set aside.
Using your mixer, combine and whip together butter, granulated sugar and brown sugar until well blended and fluffy.
Add vanilla, rum extract, egg yolks and eggnog, blend until combined. Set mixer to low speed, slowly adding dry ingredients until well blended.
Scoop a heaping tablespoon of dough and place in baking sheet lined with parchment paper. Space each cookie by 2 inches.
Bake in pre-heated oven between 11 – 13 minutes. When done, allow it to rest on baking sheet for a few minutes before transferring to wire rack to cool.
Cool completely before topping with Eggnog Frosting sprinkled lightly with nutmeg. Enjoy!
Eggnog Frosting
In mixer bowl, whip butter until well blended and fluffy. Mix in rum extract, 3 tablespoons eggnog and powdered sugar. Add more eggnog to reach desired consistency.
Video
Notes
Store eggnog cookies in zip lock bags to keep it moist.