Preheat oven to 350 degree.

In a medium mixing bowl, combine flour, baking powder, salt, nutmeg, and cinnamon. Set aside.

Using a stand mixer, combine butter, brown sugar and sugar until fluffy. Mix in eggs, one at a time. Add vanilla and rum extract, and then eggnog. Mix until combined.

With mixer on low speed, add dry ingredients slowly, until combined.

Drop batter onto a parchment lined cookie sheet, into about heaping tbsp balls. Form a little with fingers if needed, to get a circular shape when cooked.

Bake for 13 minutes, or until edges start to brown, best if not overcooked.

While cookies are cooking and cooling make icing by combining all the ingredients for the icing in a stand mixer until well combined and fluffy.

After cookies are cooled, top with icing and sprinkle with nutmeg for additional taste and look.

Enjoy!