These Guinness cupcakes with Irish cream frosting from Cookies, Cupcakes and Cardio is a St. Patrick's Day classic. A moist chocolate and stout cupcakes is topped with a rich frosting made from butter, powdered sugar and Irish cream liqueur. The stout beer has chocolate and coffee notes which makes it a natural pairing with these cupcakes. Watch her video below. Her recipe and instructions can be found here.