Preheat oven to 300°F (150°C).

Combine flour, baking powder, cinnamon and nutmeg.

Cream sugar and butter until light.

Add eggnog, vanilla, and egg yolks; beat at medium speed with mixer until smooth.

Add flour mixture and beat at low speed until just combined.

Do not overmix.

Drop by teaspoonfuls onto ungreased cookie sheet 1 inch apart.

Sprinkle lightly with nutmeg.

Bake 20 to 23 minutes until bottoms turn light brown.

If desired- you can frost with just regular butter cream frosting (Make it fancy by mixing in 1/4 tsp nutmeg.