Eggnog Cupcakes with Spiced Rum Eggnog Marshmallow Frosting

For the cupcakes:
Preheat oven to 350ºF. Make sure all your ingredients are at room temperature.

In a mixing bowl, combine flour, salt, baking powder and soda; mix well.

In your mixer fitted with the paddle attachment, blend butter, sugar and vanilla at medium speed until pale and fluffy. Add eggs and egg yolk, one at a time, scraping the bowl after each addition. Reduce speed to low and add 1 cup of the flour mixture, followed by 1/3 of the eggnog. Repeat this 3 times, until you have incorporated all the flour and eggnog. Spoon into greased cupcake pan, and bake for 18-20 minutes. Cool completely before frosting.

For the frosting:
Mix all ingredients in an electric mixer on medium until combined. Once completely combined, increase your mixer speed to high and mix for about 3-5 minutes until smooth. Pipe or frost cupcakes and decorate if desired.