1 tsp. nutmeg
1/4 tsp. rum extract
4 tbsp. (60ml) eggnog
4 cups (480g) powdered sugar
1/2 cup (95g) shortening
1/2 cup (115g) butter
1/4 cup (60ml) milk
3/4 cup (180ml) eggnog
3/4 tsp. nutmeg
1/2 tsp. vanilla extract
3 egg whites
3/4 cup salted butter (170g), room temperature
1 1/4 tsp. baking powder
1 cup (200g) sugar
1 2/3 cups (240g) all purpose flour