Ingredients:
Cupcakes
1 cup unsalted butter
1 cup Guinness stout
2/3 cup Dutch-processed cocoa powder, sifted
1 cup light brown sugar
1 teaspoon table salt
2 cups all-purpose flour
1 cup white sugar
1 1/4 teaspoons baking soda
2 eggs
1/2 cup sour cream
Frosting
1/2 cup unsalted butter
4 cups confectioners' sugar
1 pinch table salt
3 tablespoons Irish cream (Bailey's or Carolan's)
1 tablespoon milk
[ click here for full article.. ]